Optics Question 1121

Question: Young’s double slit experiment is performed with light of wavelength 550 nm. The separation between the slits is 1.10 mm and screen is placed at distance of 1 m. What is the distance between the consecutive bright or dark fringes

[Pb. PMT 2000]

Options:

A) 1.5 mm

B) 1.0 mm

C) 0.5 mm

D) None of these

Show Answer

Answer:

Correct Answer: C

Solution:

Distance between consecutive bright fringes or dark fringes $ =\beta $

$ \beta =\frac{\lambda D}{d}=\frac{550\times {{10}^{-9}}\times 1}{1.1\times {{10}^{-3}}}=500\times {{60}^{-6}}=0.5\ mm $



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