If you fail, never give up because FAIL means 'First Attempt In Learning'.— A. P. J. Abdul Kalam

Heat, Light and Sound — quick quiz

5 real OTET questions on Heat, Light and Sound. Instant scoring and solutions, no signup — see where you stand in ~3 minutes.

Question 1 of 2

EASY

A periscope uses two plane mirrors placed at 45° angles. Which property of light enables the periscope to function correctly?