television

S

sundar

New Member

• May 18, 2010

• #1

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

 

bychon

New Member

• May 18, 2010

• #2

Because the sound doesn't come from somebody at the transmitting station shouting. It comes from the speaker in your TV.

 

S

sundar

New Member

• May 18, 2010

• #3

I can't get it.

 

StudentSA

Member

• May 18, 2010

• #4

Are you refering to when you switch it on?

In that case your video displays requires alot more power than your audio system and takes longer to start up.

 

Hero999

Banned

• May 18, 2010

• #5

Don't make duplicate posts.
https://www.electro-tech-online.com/threads/light-or-sound.107380/?highlight=#post879010

You might get more help if you're more clear about what you're asking.

Normally the sound and picture are well synchronised, if the sound is slightly ahead of the picture then it's just poor dubbing and nothing to do with the speed of sound and light.

 

S

sundar

New Member

• May 18, 2010

• #6

And why do it require more power than audio..

 

S

sundar

New Member

• May 18, 2010

• #7

Iam asking question after switching on the t.v.

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• May 18, 2010

• #8

sundar said:

Iam asking question after switching on the t.v.

Click to expand...

Pretty basic question - for an old CRT set the CRT has to warm up, for modern LCD/Plasma both come on together.

But in neither case do you hear the sound before the picture, the broadcast picture is already there, just nor visible on a cold CRT.