Optics Question 1112
Question: Two parallel slits 0.6 mm apart are illuminated by light source of wavelength 6000 Å. The distance between two consecutive dark fringes on a screen 1 m away from the slits is
[JIPMER 1999]
Options:
A) 1 mm
B) 0.01 mm
C) 0.1 m
D) 10 m
Show Answer
Answer:
Correct Answer: A
Solution:
Distance between two consecutive Dark fringes $ =\frac{\lambda D}{d}=\frac{6000\times {{10}^{-10}}\times 1}{0.6\times {{10}^{-3}}} $
$ =1\times {{10}^{-3}}m=1\ mm. $
