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6:07
The Photophone
Alexander Graham Bell invented this device in 1880! It transmits sound via a beam of refle...
published: 03 Jun 2011
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1:20
Bell's photophone
Bell's photophone Less than 10 years had passed since the appearance of a wired phon...
published: 28 Jan 2012
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3:49
[Test] Photophones : Nokia Lumia 1020 vs Samsung Galaxy S4 zoom
Quel est le meilleur photophone du marché ? Nous avons mis face à face deux produits phare...
published: 02 Oct 2013
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23:27
Test du Nokia Lumia 1020 : un photophone renversant !
Le Lumia 1020 est mis en abîme et plombé par son appareil photo, puisque autant la caméra ...
published: 14 Oct 2013
author: BlogNT
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13:07
Bell's Greatest Invention
Alexander Graham Bell did not consider the telephone to be his greatest invention. This v...
published: 20 Oct 2014
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28:07
Test du Nokia Lumia 1020, le meilleur photophone est un Windows Phone !
Découvrez notre test vidéo du Nokia Lumia 1020, le meilleur photophone du marché exploitan...
published: 02 Nov 2013
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1:45
Panasonic Lumix CM1: Close up with the ultimate photo phone
The Panasonic Lumix CM1 is an Android device packed with the best camera technology you'll...
published: 02 Jan 2015
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1:12
Photophone 16mm film Projector India
...
published: 02 Apr 2013
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1:05
Photophone 16mm film Projector India
kaattile mainaye song played from 16 mm film...
published: 24 Aug 2012
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10:50
Un photophone avec un « vrai » objectif : test du Galaxy S4 Zoom (26/07)
Le constructeur coréen Samsung innove avec un objet étonnant. A la fois téléphone et appar...
published: 26 Jul 2013
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2:49
GE Handsets PhotoPhone with 7" Picture Frame
The GE 27956FE1 Handsets PhotoPhone with 7" Picture Frame features picture caller ID so wh...
published: 27 Feb 2009
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3:28
Lumix DMC-CM1 : un photophone haut de gamme signé Panasonic
Lire sur 01net : http://tinyurl.com/pkbhd22 Photokina 2014 : Panasonic Lumix CM1, enfin un...
published: 17 Nov 2014
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0:35
Reproduction photophone de Bell
Coooool !!!! Pour les TPE en 1ere S, nous avons reproduit le photophone de Bell. :) On tra...
published: 11 Feb 2013
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4:06
Geemarc PhotoPhone 100 Review By HearingDirect.com
http://www.hearingdirect.com/products/Geemarc-PhotoPhone-100-Photo-ID-Amplified-Telephone....
published: 18 May 2011
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31:19
Test du Sony Xperia Z1 : le photophone vu par Sony
Le succès de n'importe quel appareil dépend beaucoup plus de ses qualités intrinsèques, et...
published: 13 Nov 2013
author: BlogNT
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0:50
Clarity-P300 Amplified Photo Phone - CLARITY-P300
This phones uniqueness lies with it's photo ID speed dial feature. You simply touch the ph...
published: 30 Sep 2011
author: parentgiving
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2:33
Téléphone Geemarc Photophone 100
Téléphone amplifié à touche mémoire photo Photophone 100 de Geemarc Telecom à retrouver ch...
published: 18 Dec 2014
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2:04
eBay How-To Guides: How to Make a Photo Phone Case
Read the full guide at http://www.ebay.com/gds/How-to-Make-a-Photo-Phone-Case-/10000000178...
published: 26 Jun 2014
author: eBay
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10:09
The Fix - How to take incredible pictures with your phone
http://cnet.co/1gy16Yh In this episode, it's all about making the most of your smartphone ...
published: 17 Mar 2014
author: CNET
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3:36
Nokia 808 PureView de 38 Mpx - Test du photophone
Un téléphone ? Non un appareil photo : 38 megapixel, capteur de 1/1,2", grand angle de 28m...
published: 29 Jun 2012
author: CNETfrance
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2:54
How to take great photos using your smart phone.
Chicago food photographer, Stephen Hamilton, shares his tips on how to take beautiful, yet...
published: 29 Jun 2011
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1:35
RCA Photophone Loudspeaker 1929 Theather Speaker
Sweep test for a 1929 RCA Photophone speaker. You will notices that the sound cuts out pas...
published: 20 Apr 2012
author: AudioValves
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6:25
Prise en main du Lenovo Vibe Shot : un photophone
Lenovo est arrivée au Mobile World Congress 2015 avec un nouveau smartphone. Plus qu'un té...
published: 04 Mar 2015
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2:45
PhotoPhone - 韓國新勢力, 靚相變潮物。
潮流產品新概念,立即約埋班朋友來臨尖沙咀東「香港3D奇幻世界」做番件喇!現場設計, 現場打印,1分鐘完成。...
published: 27 Sep 2014
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The photophone (also known as a radiophone) is a telecommunications device which allowed for the transmission of both articulated sounds and normal human conversations on a beam of light. It was invented jointly by Alexander Graham Bell and his assistant Charles Sumner Tainter on February 19, 1880, at Bell's 1325 'L' Street laboratory in Washington, D.C. Both were later to become full associates in the Volta Laboratory Association, created and financed by Bell.

On April 1, 1880, Bell's assistant transmitted the world's first wireless telephone message to him from the roof of the Franklin School to the window of Bell's laboratory, some 213 metres (700 ft) away.

Bell believed the Photophone was his most important invention. Of the eighteen patents granted in Bell's name alone, and the twelve he shared with his collaborators, four were for the Photophone, which Bell referred to as his 'greatest achievement', writing that the Photophone was "the greatest invention [I have] ever made, greater than the telephone".




This page contains text from Wikipedia, the Free Encyclopedia - http://en.wikipedia.org/wiki/Photophone

This article is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License, which means that you can copy and modify it as long as the entire work (including additions) remains under this license.