Question

___________ of electromagnetic radiation is visible to the human eye. All A narrow portion The white color The dark colo

Answer 1

Answer: A narrow portion

Step-by-step explanation:

___________ of electromagnetic radiation is visible to the human eye.

All

A narrow portion

The white color

The dark color

Answer 2

A very small portion of the electromagnetic spectrum is visible
to the human eye.

It's kind of hard to talk about real numbers, since the electromagnetic
spectrum has no ends. But if you consider the spectrum to be the
range of frequencies between household electrical power and gamma
rays, you get a range of roughly 50 octaves, of which our eyes are able
to detect about one octave.