gamma rays X-rays visible light radio waves
I gave my students this multiple choice question: The electromagnetic spectrum is the complete range of electromagnetic radiation ranging from radio waves to gamma rays. Which type of radiation in this spectrum is associated with observable colors such as red, green, and blue?

Only one answer is correct among these 4 choices:
- gamma rays
- X-rays
- visible light
- radio waves

Could you tell me which one is correct?

visible light