Question

Two wave have intensity ratio 25:4 What is the ratio of maximum to minimum intensity?

Options

• `16/25`

• `25/4`

• `9/49`

• `49/9`

Answer 1

`49/9`

Explanation:

`I_1/I_2 = a^2/b^2 = 25/4 = a/b = 5/2`

`I_(max)/I_(min) = (a + b)^2/(a - b)^2 = (5 + 2)^2/(5 - 2)^2 = 49/9`