The ratio of intensities of two waves are given by `4:1`. The ratio of the amplitudes of the two waves is

Options

A. `2:1`
B. `1:2`
C. `4:1`
D. `1:4`

Answer

A

Explanation

We know `I alpha A^(2)`
`rArr (I_(1))/(I_(2))=(A_(1)^(2))/(A_(2)^(2))rArr sqrt(4/1)=(A_(1))/(A_(2)) rArr A_(1):A_(2) =2:1`