Q. Two light waves arrives at a certain point on a screen. The waves have the same wavelength. At the arrival point, their amplitudes and phase differences are :
(I) and rad
(II) and and
(III) , and rad
(IV) and 0 .
The pair/s which has greatest intensity is/are:

Wave Optics Report Error

I

II

II, III

I, IV

Solution:

The resulting amplitude in the given four cases are and . Thus in case I and IV intensity will be maximum and equal.

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Q. Two light waves arrives at a certain point on a screen. The waves have the same wavelength. At the arrival point, their amplitudes and phase differences are : (I) and rad (II) and and (III) , and rad (IV) and 0 . The pair/s which has greatest intensity is/are:

I

II