If the ratio of amplitude of wave is`2 : 1`, then the ratio of maximum and minimum intensity is

Options

A. `9:1`
B. `1:9`
C. `4:1`
D. `1:4`

Answer

A

Explanation

The ratio of maximum to minimum intensity is given as
`(I_("max"))/(I_("min"))=((a+b)^(2))/((a-b)^(2))`
`=((2+1)^(2))/((2-1)^(2))=(9)/(1)`