Optics Question 1066
Question: Monochromatic green light of wavelength $ 5\times {{10}^{-7}}m $ illuminates a pair of slits 1 mm apart. The separation of bright lines on the interference pattern formed on a screen 2 m away is
[CPMT 1971; DPMT 1999]
Options:
A) 0.25 mm
B) 0.1 mm
C) 1.0 mm
D) 0.01 mm
Show Answer
Answer:
Correct Answer: C
Solution:
$ \beta =\frac{\lambda D}{d}=\frac{5\times {{10}^{-7}}\times 2}{{{10}^{-3}}}m={{10}^{-3}}m=1.0\ mm $ .
