Multiple choice

What are three types of lasers?

  1. Gas, solid state, diode

  2. Diode, inverted, pointer

  3. Pointer, diode, CD

  4. Gas, metal vapor, rock

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lasers are categorized by their gain medium, which includes gas lasers (like CO2), solid-state lasers (like Nd:YAG), and semiconductor (diode) lasers.