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![[Post New]](/templates/default/images/icon_minipost_new.gif) 7 Dec 2007 23:45:21 IST
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We all know that light travels faster than sound.Then why do we hear the sound first and then see the pixellated images on TV ? . . . . all replies welcome!!
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7 Dec 2007 23:54:24 IST
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it is simultaneous!!! isnt it??
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Remember Cedric. Remember, if the time should come when you have to make a choice between what is right and what is easy, remember what happened to a boy who was good, and kind, and brave, because he strayed across the path of Lord Voldemort. Remember Cedric Diggory.
Albus Dumbledore
Goblet of Fire, Chapter 37, Page 724
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8 Dec 2007 00:09:43 IST
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that is in some channels only.. and that is because it is not the ACTUAL LIGHT AND SOUND.. it is radio and satellite transmitted signals which the television set receives and converts to audio and video for us.
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* Gaurav Ragtah ( aka Artemis Fowl )
* Agent 'G' [sniper] - SD-6 (Alliance of Twelve)
* Your friendly neighborhood spideyunlimited |
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8 Dec 2007 00:23:18 IST
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so, wat is the exact reasoning behind this???
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Remember Cedric. Remember, if the time should come when you have to make a choice between what is right and what is easy, remember what happened to a boy who was good, and kind, and brave, because he strayed across the path of Lord Voldemort. Remember Cedric Diggory.
Albus Dumbledore
Goblet of Fire, Chapter 37, Page 724
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8 Dec 2007 00:32:41 IST
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mismatch of timing of transmission of transmitting channel.. most tv networks dont have this problem only a few sometimes have it.
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* Gaurav Ragtah ( aka Artemis Fowl )
* Agent 'G' [sniper] - SD-6 (Alliance of Twelve)
* Your friendly neighborhood spideyunlimited |
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8 Dec 2007 02:16:58 IST
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No yaar..........in television we have an electron gun..which takes a bit of time to start or say heat up whereas speakers work instantaneously............so
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8 Dec 2007 13:16:33 IST
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Ufff! lol
kishan.. keping those time differences in mind, signals are transmitted so that end result main video and audio match.
Par jahan gadbad ho jaati hai, the video and audio dont match.
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* Gaurav Ragtah ( aka Artemis Fowl )
* Agent 'G' [sniper] - SD-6 (Alliance of Twelve)
* Your friendly neighborhood spideyunlimited |
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8 Dec 2007 21:44:46 IST
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yaar spidey,it happens eveywhere,in any channel.Maybe I wasnt clear - you dont hear the sound from the channel,but you hear a crackling sound first. Kishan's explanation seems to fit the bill...once the cathode ray tube gets heated,audio mmatches video....but before that only sound reaches us.
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8 Dec 2007 21:47:04 IST
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ohkay. u mean when the tv starts? maybe i didnt get u ok i agree :)
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* Gaurav Ragtah ( aka Artemis Fowl )
* Agent 'G' [sniper] - SD-6 (Alliance of Twelve)
* Your friendly neighborhood spideyunlimited |
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17 Dec 2007 15:21:43 IST
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probably its bcoz tv has cathode ray tube............it take s time to lit up
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5 Jan 2008 19:03:20 IST
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TVs have cathode ray tube, which work on the cathode rays that hit the TV screen providing different colors. This is automated by the the signals that come from cable lines or other possible sources. The audio on the other hand is automated by the electromagnetic signals in the speaker.
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16 Jan 2008 22:00:33 IST
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It's simple really.....The electron gun of the tv takes some time to haet up and form the images on the screen, but the audio signals are directly converted to sound waves and the speakers donot reqire any such time as the electron gun.
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