Optics Question 1118

Question: Two slits, 4 mm apart, are illuminated by light of wavelength 6000 Å. What will be the fringe width on a screen placed 2m from the slits

[MP PET 2000]

Options:

A) 0.12 mm

B) 0.3 mm

C) 3.0 mm

D) 4.0 mm

Show Answer

Answer:

Correct Answer: B

Solution:

β=λDd=6000×10−10×24×10−3=3×104m=0.3 mm

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