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Paranormal Activity 1


Paranormal Activity is a 2007 American supernatural horror film written and directed by Oren Peli.[1][2][5] The film centers on a young couple, Katie and Micah, who are haunted by a supernatural presence in their home. It is presented in the style of "found footage", from cameras set up by the couple in an attempt to photograph what is haunting them.
Originally developed as an independent feature and given film festival screenings in 2007, the film was acquired by Paramount Pictures and modified, particularly with a new ending. It was given a limited U.S. release on September 25, 2009, and then a nationwide release on October 16, 2009. The film earned nearly $108 million at the U.S. box office and $194 million worldwide.[6] Paramount/DreamWorks acquired the U.S. rights for $350,000.[7] It is the most profitable film ever made, based on return on investment,[8][9] although such figures are difficult to verify independently[10] as this is likely to exclude marketing costs.[11]
A sequel, Paranormal Activity 2, was released on October 22, 2010, and was followed by a prequel titled Paranormal Activity 3 on October 21, 2011. On October 19, 2012, Paranormal Activity 4 was released and Paranormal Activity 5 might be released next October. In Japan, a sequel was released, Paranormal Activity 2: Tokyo Night.[12]
Plot
In September 2006, young couple Katie and Micah have recently moved to the suburbs. Katie claims that an "evil" presence has haunted her periodically since childhood and believes that it is still following her. Each night, Micah mounts a video camera on a tripod in their bedroom to record any activity that occurs while they sleep. The first night, the camera records running footstep noises. Katie hires psychic Dr. Fredrichs, who assesses that she is being haunted not by a ghost but by a demon. He says the demon feeds off negative energy and its intent is to torment Katie no matter where she goes. He advises them not to taunt or communicate with the demon and to contact demonologist Dr. Johann Abrams for help. Though Katie seems interested in the situation, Micah does not take it seriously.
During the third night, the camera captures a low rumble and the bedroom door moving by itself. On the fifth night, demonic noises are heard before Katie awakes from a nightmare before a loud thump is heard from the living room. Micah begins to taunt the demon and the phenomena worsen. On the thirteenth night, Katie is awoken by a noise in the hallway before a screech and a loud thud. The chandelier is found to be swaying when they investigate downstairs. Micah later captures a demonic grunt with a voice recorder. During the fifteenth night, Katie gets up and stares at Micah sleeping for two hours before going outside to sit on the backyard swing. Micah tries to convince Katie to come inside but she refuses. When Micah goes inside to get her a blanket, he hears a bang in the bedroom and finds the bedroom TV turned on. Micah is then startled by Katie, who followed him inside but says that he woke her up. Katie remembers nothing the next day.
Katie, irritated by Micah's flippant response to the situation, becomes irate when Micah brings home a Ouija board despite Dr. Fredrichs' warnings. The two go out of the house that evening, leaving the Ouija board in the living room. The curtains and plants start to blow around and the Ouija board's planchette moves on its own and small fire erupts on the board and extinguishes itself. During the seventeenth night, Micah sprinkles talcum powder in the hallway and when the couple is awoken by noises, they find non-human footprints leading to the bedroom from the attic. In the attic, Micah finds a burnt photograph of a young Katie, which was previously thought to have been destroyed in an unexplained house fire when Katie was eight years old. On the eighteenth night, loud footsteps wake the couple up and are heard running out of the bedroom slamming the door. The demon continues to close and bang on the door when they leave to investigate.
Dr. Abrams is unavailable when Micah finally agrees to invite him, so Dr. Fredrichs comes instead. Upon his arrival, Dr. Fredrichs immediately has a sense of dread and apologetically leaves despite their pleas for his help, stating that his presence is only making the demon angry. During the nineteenth night, the bed covers move, the closet light turns on and off and a shadow is seen on the door before Katie is woken up by breathing in her face. Micah discovers a woman from the 1960s with the same haunting who became possessed during an exorcism and killed herself.
Katie is pulled out of the bedroom toward the closet by an unknown force during the twentieth night and discovers bite marks on her back. Later Micah finds Katie gripping a cross so tightly that it bloodies her palm. Just as he is set to leave for a motel, Katie insists that they will be okay now, her voice flat with another voice in tandem with her own.
The following night Katie gets out of bed and stands beside it staring at Micah for approximately two hours and then walks downstairs. After a moment of silence, Katie screams Micah's name, waking Micah who rushes to her. The camera records Katie screaming incessantly. Then Katie's screaming stops and a brief silence is followed by the sound of heavy footsteps coming up the stairs. After another brief silence, Micah's body is violently hurled at the camera, knocking it over sideways and revealing Katie standing in the doorway. She then slowly walks into the room, her clothing soaked with blood. Crouching over his body, she sniffs Micah's body and then slowly looks up at the camera with a sly smile. As she lunges toward the camera, her face takes on a demonic appearance just as the scene cuts to black. An epilogue text states that Micah's body was discovered by the police on October 11, 2006, and that Katie's whereabouts remain unknown.
Alternate endings
In its original version, the film featured a different ending. In this version, after going downstairs on the final night and waking Micah with a scream, only Katie is shown returning to the bedroom, holding a large bloody kitchen knife, her shirt bloodied. She sits beside the bed, holding the knife and rocking herself, until about 2 p.m. the next day, when her friend Amber calls and leaves a message expressing her concern. At about 9:20 p.m. that night, Katie is still sitting and rocking by the bed, and Amber can be heard entering the house. During this short period, Katie stops rocking, but when Amber screams (evidently after finding Micah's body) and runs out of the house, she resumes her motion. Half an hour later, just after 9:50 p.m., police enter the home and discover Micah's body as well. As they are checking Micah for vital signs, a light turns on in the bedroom down the hallway, but before the police see it, the light turns off again. They discover Katie, still sitting beside the bed with the knife. As they call to her, she wakes from her catatonic state and seems confused. As she approaches them, knife in hand, calling for Micah, they ask her to drop the weapon. Suddenly the bedroom door behind the police officers slams shut, startling them and causing them to shoot Katie, who collapses on the floor. The police then call dispatch and check the bedroom at the end of the hall, but find nothing. They discover the video camera, still running. A dedication to and a picture of Katie and Micah are then shown. The original ending for the film was available for a time for viewing on the Internet before Paramount exerted a claim of copyright on the material.[13]
Once Paramount acquired the film, two new endings were developed for the film, one of them being the one seen in theaters. The scrapped ending was shown at only one public viewing and was later offered as an alternate ending on the DVD and Blu-ray releases of the film.[13][14] In this ending, Katie gets out of bed and stands staring at Micah, as she did in the theatrical ending, except she does not move to Micah's side of the bed. About three hours pass, then she finally goes downstairs. She lets out a blood-curdling scream, which wakes Micah up and he runs downstairs. The screaming continues, and the sounds of a struggle are heard before the noises abruptly stop. There is silence for a short while before loud footsteps are heard on the stairs. Katie then walks into the bedroom, Micah's blood covering her shirt, with a knife in her hand. She closes and locks the bedroom door, before walking up to the camera, standing idle briefly. She then lifts the knife and slits her own throat, then falls to the floor, dead.

Production

First-time director Oren Peli had been afraid of ghosts his entire life, even fearing the comedy film Ghostbusters, but intended to channel that fear into something positive and productive.[15] Peli took a year to prepare his own house for shooting, going so far as to repaint the walls, add furniture, put in a carpet, and build a stairwell, in Rancho Peñasquitos.[16] In this time, he also did extensive research into paranormal phenomena and demonology, stating, "We wanted to be as truthful as we could be." The reason for making the supernatural entity in the story a demon was a result of the research pointing to the most malevolent and violent entities being "demons".[17] The phenomena in the film take place largely at night—the vulnerability of being asleep, Peli reasoned, taps into a human being's most primal fear, stating, "If something is lurking in your home there's not much you can do about it."[17]
Attempting to focus on believability rather than action and gore, Peli chose to shoot the picture with a home video camera. In deciding on a more raw and stationary format (the camera was almost always sitting on a tripod or something else) and eliminating the need for a camera crew, a "higher degree of plausibility" was created for the audience as they were "more invested in the story and the characters".[17] Peli says that the dialogue was "natural" because there was no real script. Instead, the actors were given outlines of the story and situations to improvise, a technique known as "retroscripting" used in the making of The Blair Witch Project.[17] In casting the movie, Peli auditioned "a few hundred people" before finally meeting Katie Featherston and Micah Sloat. He originally auditioned them individually and later called them back to audition together. Peli was impressed with the chemistry between the actors, saying, "If you saw the [audition] footage, you would've thought they had known each other for years."[17] During a guest appearance on The Jay Leno Show on November 3, 2009, Sloat and Featherston explained they each saw the casting call on LACasting. Featherston noted they were originally paid $500 for their work.
The film was shot out of sequence due to Peli's self-imposed seven day shooting schedule,[15] though Peli would have preferred the story unfold for the actors as he had envisioned it. Sloat, who controlled the camera for a good deal of the film, was a former cameraman at his university's TV station. "It was a very intense week", Peli recalled, stating that the film would be shot day and night, edited at the same time, and would have the visual effects applied to it as the acting footage was being finalized.[17]
The film was screened at 2007's Screamfest Horror Film Festival, where it impressed an assistant at the Creative Artists Agency, Kirill Baru, so much that CAA signed on to represent Peli. Attempting to find a distributor for the film and/or directing work for Peli, the agency sent out DVDs of the movie to as many people in the industry as they could, and it was eventually seen by Miramax Films Senior Executive Jason Blum, who thought it had potential. He worked with Peli to re-edit the film and submitted it to the Sundance Film Festival, but it was rejected. The DVD also impressed DreamWorks executives Adam Goodman, Stacey Snider, and finally Steven Spielberg, who cut a deal with Blum and Peli.[15]
DreamWorks' plan was to remake the film with a bigger budget and with Peli directing, and only to include the original version as an extra when the DVD was eventually released. "They didn't know what to do with [the original]", said Blum; they just wanted to be "in business" with Peli.[15] Blum and Peli agreed, but stipulated a test screening of the original film before going ahead with the remake, believing it would be well received by a theatrical audience.[15]
During the screening, people began walking out; Goodman thought the film was bombing, until he learned that the viewers were actually leaving because they were so frightened. He then realized a remake was unwise.[15] Paramount Pictures, which acquired DreamWorks in 2005, bought the domestic rights to the film, and international rights to any sequels, for $350,000 USD.[18] When the film was taken in by Paramount Pictures, several changes were made. Some scenes were cut, others added, and the original ending was scrapped, with two new endings being shot.[19] The ending shown in theaters during the film's worldwide release is the only one of the three to feature visual effects, and it differs from the endings previously seen at the Screamfest and Burbank screenings.[20][21] The theatrical release was delayed indefinitely because Paramount had put all DreamWorks productions on hold. Meanwhile, a screening for international buyers resulted in the sale of international rights in 52 countries.[15] Only after Goodman became production chief at Paramount in June 2009 did the film finally get slated for a fall release.[15]

Release

Paranormal Activity premiered at Screamfest Film Festival in North America on October 14, 2007, was shown at the Slamdance Film Festival on January 18, 2008, and screened at the 36th Annual Telluride Film Festival on September 6, 2009.[22]
The version with the new ending, made after Paramount acquired the film, had screenings on September 25, 2009 in 13 college towns across the United States. On his website, director Oren Peli invited internet users to "demand" where the film went next by voting on eventful.com.[23] This was the first time a major motion picture studio used the service to virally market a film.[24] Twelve of the 13 venues sold out.[25] On September 28, Paramount issued a press release on Peli's website, announcing openings in 20 other markets on Friday, October 2, including larger market cities such as New York and Chicago.[26]
On October 3, it was reported that a total of 33 screenings in all 20 markets sold out and that the movie had made $500,000 domestically. A day later, Paramount announced that the film would have a full limited release in 40 markets, playing at all hours (including after-midnight showings). On October 6, Paramount announced that the movie would be released nationwide if the film got 1,000,000 "demands" on eventful.com. The full limited release of the film started on Friday, October 9.[27][28][29] On October 10 the Eventful.com counter hit over 1,000,000 requests.[30][31] Paramount announced soon after that the film would get a wide domestic release on Friday, October 16 and then expand to more theaters on the 23rd.[32] By November, it was showing in locales worldwide.
This film also had no opening or closing credits, other than the copyright info shown after the film ends.

Home release

Paranormal Activity was released on DVD and Blu-ray on December 29, 2009.[33] The home release media includes an alternate ending to the theatrical version, in which Katie slits her own throat in front of the camera, then collapses to the floor.[34] It was released in the UK on March 22, 2010 on DVD and Blu-ray with some specials.[35] In the Netherlands the movie received a release on VHS in 2010.[36]
Additionally, at the end of the film, 15 minutes worth of names were added to the DVD release as part of a special promo where the fans who "demanded" the movie were asked by email if they wanted to have their name appear as a thank you for the movie's success.

Reception

Reviews

The film received positive critical reception upon release. Based on 184 reviews collected by Rotten Tomatoes, the film has an overall approval 'Fresh' rating from critics of 82%.[37] Movie critics James Berardinelli and Roger Ebert each awarded it 3.5 stars out of a maximum of 4 stars.[38][39] Ebert stated in his review: "It illustrates one of my favorite points, that silence and waiting can be more entertaining than frantic fast-cutting and berserk f/x. For extended periods here, nothing at all is happening, and believe me, you won't be bored."[40] Entertainment Weekly critic Owen Gleiberman gave Paranormal Activity an A− rating and called it "frightening...freaky and terrifying" and noted that "Paranormal Activity scrapes away 30 years of encrusted nightmare clichés."[41] Bloody Disgusting ranked the film 16th in their list of the "Top 20 Horror Films of the Decade", with the article saying, "Peli deserves props for milking the maximum amount of tension out of the spare, modern setting—an ordinary, cookie-cutter tract home in San Diego. It doesn't sound very scary, but Peli manages to make it terrifying. If you aren’t white-knuckling your armrest at least once or twice while watching it, you probably don't have a pulse.."[42] However, David Stratton of the Australian version of At the Movies remarked that "it was extremely unthrilling, very obvious, very cliched. We've seen it all before."[43]

Box office

The film opened on September 25, 2009, to 12 theaters taking $36,146 on its opening day and $77,873 on its first weekend for an average of $6,489 per venue. It took more success when it opened to 33 theaters on October 1, 2009, doubling the box office reception, grossing $532,242 for an average of $16,129 per venue, bringing the 10-day total to $776,763.[44]
As it expanded to 160 theaters on the October 9–11 weekend, the film grossed $2,659,296 on that Friday having a per-theater average of $16,621. It went on to gross $7,900,695, which was $800,000 more than originally estimated. Over the weekend, the film reached the week's highest per-theater average of $49,379, coming in at #4 for the weekend, behind Couples Retreat, Zombieland, and Cloudy with a Chance of Meatballs. Over the weekend of October 16, 2009, Paranormal Activity expanded to 600 more theaters, grossing $19,617,650 with $25,813 per theater average gross, and bringing the total gross to $33,171,743. On the weekend of October 23, 2009, Paranormal Activity rose to #1, beating out the expected number one box office victor Saw VI, earning $21,104,070, expanding to 1,945 theaters for an average of $10,850 per theater, compared with the $14,118,444 gross from 3,036 theaters, and $4,650 average for Saw VI. The film has grossed $107,918,810 domestically and $85,436,990 in foreign markets, with a total gross of $193,355,800.[44][45]
Using unique social media strategy for both the first and subsequent films, Paranormal Activity was one of the first film franchises of its kind to use social media to make the connection with filmgoers.[46]

Valentine's Day


Asosiasi pertengahan bulan Februari dengan cinta dan kesuburan sudah ada sejak dahulukala. Menurut tarikh kalender Athena kuno, periode antara pertengahan Januari dengan pertengahan Februari adalah bulan Gamelion, yang dipersembahkan kepada pernikahan suci Dewa Zeus dan Hera.
Di Roma kuno, 15 Februari adalah hari raya Lupercalia, sebuah perayaan Lupercus, dewa kesuburan, yang dilambangkan setengah telanjang dan berpakaian kulit kambing. Sebagai bagian dari ritual penyucian, para pendeta Lupercus meyembahkan korban kambing kepada sang dewa dan kemudian setelah minum anggur, mereka akan lari-lari di jejalanan kota Roma sembari membawa potongan-potongan kulit domba dan menyentuh siapa pun yang mereka jumpai. Terutama wanita-wanita muda akan maju secara sukarela karena percaya bahwa dengan itu mereka akan dikarunia kesuburan dan bisa melahirkan dengan mudah.

Hari Raya Gereja

Menurut Ensiklopedi Katolik (Catholic Encyclopaedia 1908), nama Valentinus paling tidak bisa merujuk tiga martir atau santo (orang suci) yang berbeda:

* seorang pastur di Roma
* seorang uskup Interamna (modern Terni)
* seorang martir di provinsi Romawi Africa.

Koneksi antara ketiga martir ini dengan hari raya cinta romantis tidak jelas. Bahkan Paus Gelasius I, pada tahun 496, menyatakan bahwa sebenarnya tidak ada yang diketahui mengenai martir-martir ini namun hari 14 Februari ditetapkan sebagai hari raya peringatan santo Valentinus. Ada yang mengatakan bahwa Paus Gelasius I sengaja menetapkan hal ini untuk mengungguli hari raya Lupercalia yang dirayakan pada tanggal 15 Februari.

Sisa-sisa kerangka yang digali dari makam Santo Hyppolytus dia Via Tibertinus dekat Roma, diidentifikasikan sebagai jenazah St. Valentinus. Kemudian ditaruh dalam sebuah peti emas dan dikirim ke gereja Whitefriar Street Carmelite Church di Dublin, Irlandia. Jenazah ini telah diberikan kepada mereka oleh Paus Gregorius XVI pada 1836. Banyak wisatawan sekarang yang berziarah ke gereja ini pada hari Valentine, di mana peti emas diarak-arak dalam sebuah prosesi khusyuk dan dibawa ke sebuah altar tinggi. Pada hari itu sebuah misa khusus diadakan dan dipersembahkan kepada para muda-mudi dan mereka yang sedang menjalin hubungan cinta.

Hari raya ini dihapus dari kalender gerejawi pada tahun 1969 sebagai bagian dari sebuah usaha yang lebih luas untuk menghapus santo-santa yang asal-muasalnya bisa dipertanyakan dan hanya berbasis legenda saja. Namun pesta ini masih dirayakan pada paroki-paroki tertentu.

Valentinius

Guru ilmu gnostisisme yang berpengaruh Valentinius, adalah seorang calon uskup Roma pada tahun 143. Dalam ajarannya, tempat tidur pelaminan memiliki tempat yang utama dalam versi Cinta Kasih Kristianinya. Penekanannya ini jauh berbeda dengan konsep ... dalam agama Kristen yang umum. Stephan A. Hoeller, seorang pakar, menyatakan pendapatnya tentang Valentinius mengenai hal ini: "Selain sakramen permandian, penguatan, ekaristi, imamat dan perminyakan, aliran gnosis Valentinius juga secara prominen menekankan dua sakramen agung dan misterius yang dipanggil "penebusan dosa" (apolytrosis) dan "tempat pelaminan" ..." [1].

Era abad pertengahan

Catatan pertama dihubungkannya hari raya Santo Valentinus dengan cinta romantis adalah pada abad ke-14 di Inggris dan Perancis, di mana dipercayai bahwa 14 February adalah hari ketika burung mencari pasangan untuk kawin. Kepercayaan ini ditulis pada karya sang sastrawan Inggris Pertengahan ternama Geoffrey Chaucer pada abad ke-14. Ia menulis di cerita Parlement of Foules (“Percakapan Burung-Burung”) bahwa

For this was sent on Seynt Valentyne's day (“Bahwa inilah dikirim pada hari Santo Valentinus”)
Whan every foul cometh ther to choose his mate (“Saat semua burung datang ke sana untuk memilih pasangannya”)

Pada jaman itu bagi para pencinta sudah lazim untuk bertukaran catatan pada hari ini dan memanggil pasanagan mereka "Valentine" mereka. Sebuah kartu Valentine yang berasal dari abad ke-14 konon merupakan bagian dari koleksi pernaskahan British Library di London. Kemungkinan besar banyak legenda-legenda mengenai santo Valentinus diciptakan pada jaman ini. Beberapa di antaranya bercerita bahwa:

* Sore hari sebelum santo Valentinus akan gugur sebagai martir (mati syuhada), ia menulis sebuah pernyataan cinta kecil yang diberikannya kepada sipir penjaranya yang tertulis "Dari Valentinusmu".
* Ketika serdadu Romawi dilarang menikah oleh Kaisar Claudius II, santo Valentinus secara rahasia membantu menikahkan mereka.

Pada kebanyakan versi legenda-legenda ini, 14 Februari dihubungkan dengan keguguran sebagai martir.

Hari Valentine pada era modern

Hari Valentine kemungkinan diimpor oleh Amerika Utara dari Britania Raya, negara yang mengkolonisasi daerah tersebut. Di Amerika Serikat kartu Valentine pertama yang diproduksi secara massal dicetak setelah tahun 1847 oleh Esther A. Howland (1828 – 1904) dari Worcester, Massachusetts. Ayahnya memiliki sebuah toko buku dan toko peralatan kantor yang besar dan ia mendapat ilham untuk memproduksi kartu dari sebuah kartu Valentine Inggris yang ia terima. (Semenjak tahun 2001, The Greeting Card Association setiap tahun mengeluarkan penghargaan "Esther Howland Award for a Greeting Card Visionary".)

Sejarah Listrik


Sejarah awal ditemukannya listrik adalah oleh seorang cendikiawan Yunani yang bernama Thales, yang mengemungkakan fenomena batu ambar yang bila digosok - gosokkan akan dapat menarik bulu sebagai fenomena listrik. Kemudian setelah bertahun - tahun semenjak ide Thales dikemukakan, baru kemudian muncul lagi penapat - pendapat serta teori -teori baru mengenai listrik seperti yang diteliti dan dikemukakan oleh William Gilbert, Joseph priestley, Charles De Coulomb, AmpereMichael Farraday, Oersted, dll.

informasi tentang sejarah penemu listrik ini disajikan dalam bentu panel dan didukung dengan perangkat audio visual yang menyajikan tiruan dari percobaan - percobaan yang pernah dilakukan oleh para ilmuan.

Ben Franklin
Banyak orang berpikir Benyamin Franklin menemukan listrik terkenal dengan layang-layang percobaan pada 1752, namun
listrik tidak ditemukan sekaligus. Pada awalnya, listrik dikaitkan dengan cahaya.
Orang ingin yang murah dan aman cara untuk cahaya rumah mereka, dan para ilmuwan berpikir listrik mungkin jalan.

Baterai

Belajar bagaimana memproduksi dan menggunakan listrik tidak mudah. Untuk waktu yang lama ada
ada sumber diandalkan listrik untuk percobaan. Akhirnya, pada tahun 1800, Alessandro Volta, seorang ilmuwan Italia, membuat penemuan besar. dia basah kuyup
kertas dalam air garam, seng dan tembaga ditempatkan di sisi berlawanan dari kertas, dan mengamati reaksi kimia menghasilkan arus listrik. Volta telah
menciptakan sel listrik pertama. Dengan menghubungkan banyak dari sel-sel ini bersama-sama, Volta mampu "string saat ini" dan membuat baterai. Hal ini untuk menghormati Volta bahwa kita mengukur daya baterai dalam volt. Akhirnya, sumber yang aman dan dapat diandalkan listrik tersedia, sehingga mudah bagi para ilmuwan untuk mempelajari listrik.

Seorang ilmuwan Inggris, Michael Faraday, adalah orang pertama yang menyadari bahwa
arus listrik dapat dihasilkan dengan melewatkan magnet melalui
kawat tembaga. Itu adalah penemuan yang menakjubkan. Hampir semua listrik
kita gunakan saat ini dibuat dengan magnet dan kumparan dari kawat tembaga di raksasa
pembangkit listrik.
Kedua generator listrik dan motor listrik didasarkan pada ini
prinsip. Sebuah generator mengubah energi gerak menjadi listrik. Sebuah
Motor mengubah energi listrik menjadi energi gerak.


Thomas Edison
n 1879, Thomas Edison
berfokus pada menciptakan suatu
Cahaya lampu, yang
akan bertahan lama sebelum
terbakar. Masalahnya adalah
menemukan bahan yang kuat untuk
filamen, kawat kecil
di dalam bohlam yang melakukan
listrik. Akhirnya, Edison digunakan
biasa kapas benang yang
telah direndam dalam karbon.
Filamen ini tidak terbakar sama
semua itu menjadi pijar;
yaitu, ia bersinar.

Tantangan berikutnya adalah mengembangkan sistem listrik yang dapat
menyediakan orang dengan sumber praktis energi untuk daya ini baru
lampu. Edison ingin cara untuk membuat listrik praktis dan
murah. Dia dirancang dan dibangun pembangkit listrik pertama yang
mampu menghasilkan listrik dan membawanya ke rumah-rumah penduduk.
Edison Pearl Street Power Station dimulai generator yang pada
September 4, 1882, di New York City. Sekitar 85 pelanggan di bawah
Manhattan menerima daya yang cukup untuk menyalakan lampu 5.000. nya
pelanggan membayar banyak untuk listrik mereka, meskipun. Dolar di hari ini,
listrik biaya $ 5,00 per kilowatt-jam! Saat ini, biaya listrik
sekitar 12 sen per kilowatt-jam untuk pelanggan perumahan, dan
sekitar 7 sen per kilowatt-jam untuk industri.

AC/DC
Titik balik dari usia listrik datang beberapa tahun kemudian dengan
perkembangan AC (alternating current) sistem tenaga. dengan
arus bolak-balik, pembangkit listrik bisa mengangkut banyak listrik
jauh dari sebelumnya. Pada tahun 1895, George Westinghouse membuka pertama
pembangkit listrik utama di Niagara Falls menggunakan alternating current. sementara
Edison DC (arus searah) tanaman hanya dapat mengangkut listrik
dalam satu mil persegi nya Pearl Street Power Station, Niagara
Tanaman jatuh mampu mengangkut listrik lebih dari 200 mil!
Listrik tidak memiliki awal yang mudah. Banyak orang
senang dengan semua penemuan baru, tetapi beberapa orang takut
listrik dan waspada membawa ke rumah mereka. banyak sosial
kritikus hari melihat listrik sebagai mengakhiri cara, sederhana kurang sibuk
kehidupan. Penyair berkomentar bahwa lampu listrik kurang romantis daripada
lampu gas. Mungkin mereka benar, tetapi usia listrik baru bisa
tidak redup.
Pada tahun 1920, hanya dua persen dari energi di AS digunakan untuk membuat
listrik. Hari ini, sekitar 41 persen dari seluruh energi yang digunakan untuk membuat
listrik. Seperti kami menggunakan teknologi tumbuh, angka itu akan terus
meningkat.