Towhich form lightenergy is converted from abulb?

Question

as the law of conservation of energy,all energy forms converts into another form,but how light&heat energy from a lightening bulb converts into another form?

Answer 1

As electric current flows into the bulb filament , the electrostatic energy ( if it is DC ) or the electromagnetic energy (if it is AC), meets resistance in the form of random movement of the electrons in the filament - in fact it increases this random movement of the electrons , and random movement is nothing but what we perceive as heat, so the filament heats up.

As it heats up more, the same electrons in the filament gets into higher electronic orbit ( because of their higher kinetic energy) and transitions back into a lower energy shell ( because the lower energy shells are more stable ) by emitting a light quantum , ofr photon which is what constitutes the electromagnetic radiation and what we perceive as light.

In other words,

electrostatic or electromagnetic energy in the current

=

greater random kinetic energy of faster moving electrons
( heat, heated filament )

+

electromagnetic radiation ( light, if it is in the visible range )

.
Hope this helps .....

Answer 2

In an incandescent bulb, all of the incoming electric energy is transformed first into heat. When the filament gets hot, some of the thermal energy is transformed into light energy. That part which is transformed into light escapes into the environment, and eventually it will be absorbed and transformed into heat also.

Answer 3

Hi. Incandescent bulbs convert most of their electrical energy into heat. This is due to the resistance of electric flow in the filament. Just like a toaster.

Answer 4

Incandescent bulbs emit light due to the fact that the filament is glowing brightly because of its extreme temperature. Electrical resistance in the filament provides the conversion from electricity to heat. Basically, you are forcing a lot of electricity through a VERY tiny wire to make it glow "white hot".

Answer 5

heat energy
also kinetic energy (photoelectric effect)

Answer 6

into thermal energy