Q. In Young’s double slit interference experiment, the slit separation is made 3 fold. The fringe width becomes
A) $1/3\ times$
B) $1/9\ times$
C) $3\ times$
D) $9\ times$
Explanation
(a) $\beta \propto \frac{1}{d} \Rightarrow$ If $d$ becomes thrice, then $\beta$ becomes $\frac{1}{3}$ times
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.