Question

How electrical energy is converted into light energy?

Answer 1

Answer:

It can only change its form. In the case of an electric bulb, the electrical energy is converted to light and heat. The amount of electrical energy put into a bulb = the amount of light energy (desirable form) plus the heat energy that comes out of the bulb (undesirable form).

Answer 2

Answer:

The amount of electrical energy put into a bulb = the amount of light energy plus the heat energy that comes out of the bulb.

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