Optics Question 1073

Question: In Young’s experiment, the distance between the slits is reduced to half and the distance between the slit and screen is doubled, then the fringe width

[IIT 1981; UPSEAT 2000, 04; Kerala PMT 2004]

Options:

A) Will not change

B) Will become half

C) Will be doubled

D) Will become four times

Show Answer

Answer:

Correct Answer: D

Solution:

$ \beta =\frac{\lambda D}{d}\Rightarrow $ If D becomes twice and d becomes half so $ \beta $ becomes four times.



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