Why sound comes first instead of light when you switch on the TV as light travels first?
In the old days, TV Tubes took time to heat up to operate. The new TV's Flat screens may not have the same difference.
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Answer . Light bulb filaments glow rather than burn because of the lack of oxygen within the vacuum of the bulb. Over time, the heating and contracting of the filament an…d the glass surrounding it creates a leak in the base of the bulb causing the vacuum to be lost and allowing oxygen to enter the bulb. It is during the contracting phase, which happens as the bulb cools after being turned off, that eventually the seal is lost. When this happens, oxygen is allowed to enter and the next time the bulb is turned on, the filament, now exposed to the oxygen, burns out.
the earliest safe dimmer switch - used in the theater - was invented by Granville Woods in the 1890's.
The first switch light was invented by John Henry Holmes in 1884.In 1890, Granville Woods invented the first dimmer switch, whichoffered a knob to control how bright or dim a …room could be.
The worlds first light switch was invented by Moe Goldberg in 1893.
The colors and the picture need to come into focus where as the sound is already in clear pitch.
People used candles to light Christmas trees before there wereelectric lights.
Yes, because the fulcrum is in the middle (the part that makes the switch go up and down) the effort is where you push up and down with your fingers the load is your fingers. …It is a first class lever.
At the speed of light.
They don't really travel at the same speed, but, on television, the distance they travel is so short, that the difference between the speed of sound and the speed of light is …almost non-existant.
The reason you hear sound before the picture is that your speakers will work immediate as your screen needs a second or two to start up.
light travel faster than sound. see in real life we see lightning first then we hear the thunder.
The colours and the picture need to come into focus where as the sound is already in clear pitch. Read more: http://wiki.answers.com/Why_does_the_sound_comes_firstand_then_…picture_on_the_TV_when_we_first_turn_it_on#ixzz18PAV5eIr .
On a desktop, the power button will usually light up. On a laptop, the power lights (located on the front of the laptop) will usually light up first.
The technology to travel at or near the speed of light does notexist and is nowhere close to being developed. No astronaut orman-made object has travelled to other stars.
They had candles