Question

Waves from two coherent sources of light having an intensity ratio I₁ : I₂ equal to 'x' interfere. Then in the interference pattern obtained on the screen, the value of (I_max - I_min)/(I_max + I_min) is ______ 

Options

• `sqrtx"/"x - 1`

• `2sqrtx"/"x - 1`

• `2sqrtx"/"x + 1`

• `sqrtx"/"x + 1`

Answer 1

Waves from two coherent sources of light having an intensity ratio I₁ : I₂ equal to 'x' interfere. Then in the interference pattern obtained on the screen, the value of (I_max - I_min)/(I_max + I_min) is `underline(sqrtx"/"x + 1)`.

Explanation:

The ratio of intensities of the two waves = x = `I_1/I_2`

∴ Ratio of the amplitudes = `A_1/A_2 = sqrtx`