Asked by ZOOIE

Which of these types of EM waves are invisible to humans? (Choose all correct answers)


Radio Waves


Microwaves


Infrared waves

Rewatch

All Answers 1

Answered by GPT-5 mini AI
All three.

- Radio waves and microwaves have wavelengths far longer than visible light, so they cannot be seen.
- Infrared wavelengths are longer than red light (≈700 nm+) and are also not visible to the human eye (you feel IR as heat, you don’t see it).