light travels faster than sound then why do we hear sound first and not video i

light travels faster than sound then why do we hear sound
first and not video in telivision?

Question Posted / sunakal

4 Answers
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light travels faster than sound then why do we hear sound first and not video in telivision?..

Answer / a.mohanbabu

In most cases, the television needs to 'warm-up' its cathode
ray tube before it can start to display an image on the screen.

The audio coils require much less charging time and can
start to emit sound sooner than we can see the image on the
television

Is This Answer Correct ?

29 Yes

7 No

light travels faster than sound then why do we hear sound first and not video in telivision?..

Answer / monk

the video signal donot move with the speed of light but
with the speed of the carrier wave.
the video is amplitude modulated and audio is frequency
modulated signal and AM takes more time for transmission
than Fm signals.
hence we hear sound first and not the video in the Tv

Is This Answer Correct ?

19 Yes

3 No

light travels faster than sound then why do we hear sound first and not video in telivision?..

Answer / raj kumar rawat

in telivision sound coming by frequency modulation and
picture coming by amplitude modulation

Is This Answer Correct ?

15 Yes

8 No

light travels faster than sound then why do we hear sound first and not video in telivision?..

Answer / hariteja jyosyula

In television picture coming due to AM
While the sound due to FM

Here we have to notice that the electrons ejected by crt is
not in the velocity of light to get instant picture after
switch on the tv. While sound has its same velocity

Is This Answer Correct ?

10 Yes

3 No

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