Chemical energy changes to light energy. Chemical energy changes to heat energy. Electrical energy changes to light energy. Electrical energy changes to chemical energy.
I gave my students this multiple choice question: What is an energy change that takes place in a light bulb?

Only one answer is correct among these 4 choices:
- Chemical energy changes to light energy.
- Chemical energy changes to heat energy.
- Electrical energy changes to light energy.
- Electrical energy changes to chemical energy.

Could you tell me which one is correct?

Electrical energy changes to light energy.