Q.

What is a laser?

A. Electro-magnetic waves
B. Ultrasonic waves
C. Supersonic waves
D. Light amplification by stimulated emission of radiation
E. Green
Answer» D. Light amplification by stimulated emission of radiation
1.4k
0
Do you find this helpful?
7

View all MCQs in

Environmental Engineering

Discussion

No comments yet

Related MCQs