If the amplitude of two interfering light waves are not equal, then the intensity in the dark region formed in the interference pattern will be

Options

A. more
B. less
C. same
D. zero

Answer

A

Explanation

If amplifudes of two waves are equal then intensity of dark point is zero. If amplitudes of two waves are not equal then the intnsity of dark point increases according to equation
`R= sqrt(a_(1)^(2)+a_(2)^(2)+2a_(1)a_(2) cos (alpha_(1)- alpha_(2)))`