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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
5 Dec 2021

Given information

slit width  

Angle at which parallel light falls on slit.   

Step-by-step explanation

Step 1.

When the parallel light makes angle or when the parallel rays are perpendicular to screen on which fringes are obtained , central fringe is formed in front of 

the slit . Its width is twice the width of a single fringe. 

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