Question

Two coherent sources have intensities in the ratio 64:1. The amplitudes are in ratio

Answer 1

Question 37112

We are given $\frac{I_1}{I_2} = 64$ . Since intensities are proportional to square of amplitudes ( $I = C \cdot E^2$ ), so $\frac{E_1^2}{E_2^2} = 64$ and $\frac{E_1}{E_2} = 8$ - this is the ratio of amplitudes.