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If yellow light in the Young’s double slit experiment is replaced by red light, then the fringe width will :

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+1 vote
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If yellow light in the Young’s double slit experiment is replaced by red light, then the fringe width will : 

(a) increase 

(b) decrease 

(c) remain unaffected 

(d) first increase and then decrease

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1 Answer

+2 votes
by (71.8k points)
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Best answer

Correct option (a) increase

Explanation:

The fringe width is given by

Hence, fringe width increases.

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