Three different lasers are emitting steady beams of light. Each beam consists of countless copies a single original photon of light. However, not all colors can be emitted by a laser. Which of the following choices is possible for these three lasers?
A) Yellow, green, and blue light
B) Green, blue, and white light
C) Blue, white, and yellow light
D) White, yellow, and green light

Question

Quizplus · Accepted Answer

Lasers emit light of a specific wavelength, corresponding to a specific color. White light is a combination of all visible wavelengths and cannot be emitted by a single laser, which rules out choices B, C, and D.

Three Different Lasers Are Emitting Steady Beams of Light