Optics Question 1102

Question: In Young’s double slit experiment, the distance between the slits is 1 mm and that between slit and screen is 1 meter and 10th fringe is 5 mm away from the central bright fringe, then wavelength of light used will be

[RPMT 1997]

Options:

A) 5000AA

B) 6000AA

C) 7000AA

D) 8000AA

Show Answer

Answer:

Correct Answer: A

Solution:

By using xn=nλDd

(5×103)=10×λ×1(1×103)λ=5×107m

=5000AA



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