Q. In Young’s experiment, the distance between the slits is reduced to half and the distance between the slit and screen is doubled, then the fringe width
A) Will not change
B) Will become half
C) Will be doubled
D) Will become four times
Explanation
(d) $\beta = \frac{\lambda D}{d} \Rightarrow$ If $D$ becomes twice and $d$ becomes half so $\beta$ becomes four times
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.