Question

all of the following wavelengths are invisible to the human eye EXCEPT

Answer 1

Hi, First of All, I like your name.
There are types of wavelengths, which ones are in your answer choices? Are they something like Gamma ray, visible light, etc?

Answer 2

The electromagnetic spectrum consists of several types of waves with varying wavelengths, including: radio waves, microwaves, infrared, visible light, ultraviolet (UV), x-rays, and gamma waves. The only type of wave that can be seen by the human eye, however, is visible light...this is why it's called "visible" light. :)