Once we switch off the light where the light is going?.?

Answer 1

Interesting question. It can be answered in different ways.

1. From physics point of view, if you mean where the light goes, the answer would be the light energy is converted into other form of energy.

2. From electrical engineering point of view ( also physics ), when we switch off the light the current stops flowing through the filament ( in case of a filament lamp ) and thus there is no light. In a filament lamp the electrical energy is converted into light and heat energy.

If you mean something else pls elaborate.

Answer 2

Nowhere because it no longer exists. Light from a light bulb exists and is seen because an electric current is passed through a very thin piece of wire with an extremely high resistance. The wire becommes so hot it radiates energy in the visible spectrum as white light - the filament in the globe is white hot. Why doesn't it disintegrate? Because it is kept in a vacuum (like the vacuum tubes that ran 1950's computers) or an inert gas that prevents it from reaching critical mass by transferring enough heat away through the glass to keep it just cool enough. Like a fan on a hot day.

When you turn off the switch you instantly stop the current and the wire cools and stops radiating light.

An electric radiator seems to emit red light because it has a much longer coil of wire to absorb the electric current so it does not get as hot. Turn off the power and it stops glowing. Is it still hot? Bloody oath!

All this is caused by friction - the resistance of the wire to the current. Just like when you rub your hands together - the harder and faster you do it the hotter they get.

Get a book on physics and that may explain it better. _:))

Answer 3

Light is energy, so a better question is where does the energy go when the switch is disconnected......(my husband is an electrician)

The way I understand it is, the energy that would be running through the light bulb circuit is just left as an open voltage, waiting for that switch to be turned on to go through the bulb and activate it. Without that switch being turned on, the voltage just waits there, providing you pay your electricity bill every month :-)

Answer 4

Light is all the time going or propagating even when the switch is on. Being wave motion light exits as well as propagates both at the same time and in a correlated manner. We may think that light in the room is a separate entity from the light emitted by the filament and the light absorbed or propagated. But they all are one, only separated in time and space and in all cases transitory. In the filament it is produced and propagated. On the way it is propagated. In the retina of our eyes and while falling on opaque objects it vanishes, rather gets converted to other form of energy.

Answer 5

light is not getting destroyed once we switch off. when the switch is on the light rays come and hit our eyes thus giving us a sensation of sight. when it is switched off there is no light prodused to give us the sensation as before. the already prodused rays get reflected into the atmosphere ar absorbed

Answer 6

light is a form of energy.
in our candescent lamps, heat energy is converted to light.
that heat energy is supplied by electricity.
when you switch off, you stop the electricity and thereby stop the source of energy and stop the entire chain.
hence, the light doesn't go anywhere.

Answer 7

there is no light because there is no electricity to light it on

Answer 8

the light is basicly going to its last points that it hit, and reflected off of....then it dissipates to nothing, leaving darkness....

Answer 9

It is either reflected or adsorbed

Answer 10

stop glowing