It absorbs all the white light and turns most of it into blue light. It reflects the blue part of the light and absorbs most of the rest. It absorbs only the blue part of the light. It gives off its own blue light.
I gave my students this multiple choice question: When white light shines on Peter's shirt, the shirt looks blue. Why does the shirt look blue?

Only one answer is correct among these 4 choices:
- It absorbs all the white light and turns most of it into blue light.
- It reflects the blue part of the light and absorbs most of the rest.
- It absorbs only the blue part of the light.
- It gives off its own blue light.

Could you tell me which one is correct?

It reflects the blue part of the light and absorbs most of the rest.