Two light waves travelling in same medium are given by `E_(1)=2sin(100pit-kx+30^(@))` and `E_(2)=3cos(200pit-k^(')x+60^(@))`. The ratio of intensity of first wave to that of second wave is:

Options

A. `2/3`
B. `4/9`
C. `1/9`
D. `1/3`

Answer

B

Explanation

`I propA^(2) :. (I_(1))/(I_(2))=(2^(2))/(3^(2)) =4//9`