Question

A light source emits light with dominant wavelengths in the range of 650 to 690 nm. what is the principle color of light emitted by the source?

Answer 1

Please see below as the answer is self-explanatory.

Step-by-step explanation:

• The visible range extends roughly from 400 nm (violet) to 700 nm (red).
• Below the violet is the ultra-violet spectrum (with higher energy) and above red, we have the infra-red spectrum.
• The wavelengths in the range of 650 to 690 nm have red as the dominant color.