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0 votes
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in Physics by (61.3k points)

Two monochromatic light waves of amplitude A and 2A interfering at a point have a phase difference of 60°. The intensity at that point will be proportional to: 

(a)  3A2

(b)  5A2 

(c)  7A2 

(d)  9A2

1 Answer

+1 vote
by (64.1k points)
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Best answer

Correct option  (c)  7A2

Explanation:

The resultant amplitude of light waves of amplitude a1 and  a2 at point when phase difference is δ is 

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