Optics Question 1115
Question: In Young’s experiment, monochromatic light is used to illuminate the two slits A and B. Interference fringes are observed on a screen placed in front of the slits. Now if a thin glass plate is placed normally in the path of the beam coming from the slit
[UPSEAT 1993, 2000; AIIMS 1999, 2004]
Options:
A) The fringes will disappear
B) The fringe width will increase
C) The fringe width will increase
D) There will be no change in the fringe width but the pattern shifts
Show Answer
Answer:
Correct Answer: D
Solution:
In the presence of thin glass plate, the fringe pattern shifts, but no change in fringe width.
