Question
Physics Question on Youngs double slit experiment
In Young's double slit experiment the separation d between the slits is 2 mm, the wavelength λ of the light used is 5896 Å and distance D between the screen and slits is 100 cm. It is found that the angular width of the fringes is 0.20°. To increase the fringe angular width to 0.21° (with same λ and D) the separation between the slits needs to be changed to
A
1.8mm
B
2.1mm
C
1.9mm
D
1.7mm
Answer
1.9mm
Explanation
Solution
The correct option is (C): 1.9mm