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 $
