The night before the exam, sleep. A rested mind recalls what a tired one has only read.

Light & Sound — quick quiz

5 Bihar Police-pattern questions on Light & Sound. Instant scoring and solutions, no signup — see where you stand in a few minutes.

Question 1 of 5

Easy

The frequency of a sound wave is 500 Hz and its wavelength is 0.66 m. What is the speed of sound in the medium?