is a broad band within the spectrum. is a narrow band within the spectrum. makes up 50 percent of the spectrum. makes up more than 75 percent of the spectrum.
I gave my students this multiple choice question: Visible light in the electromagnetic spectrum

Only one answer is correct among these 4 choices:
- is a broad band within the spectrum.
- is a narrow band within the spectrum.
- makes up 50 percent of the spectrum.
- makes up more than 75 percent of the spectrum.

Could you tell me which one is correct?

is a narrow band within the spectrum.