Q. In Young’s double alit experiment, the seventh maximum with wavelength $\lambda_{1}$ is at a distance $d_{1}$ and the same maximum with wavelength $\lambda_{2}$ is at distance$d_{2}$. Then $d_{1}/d_{2} =$
A) $\frac{\lambda_{1}}{\lambda_{2}}$
B) $\frac{\lambda_{2}}{\lambda_{1}}$
C) $\frac{\lambda_{1}^{2}}{\lambda_{2}^{2}}$
D) $\frac{\lambda_{2}^{2}}{\lambda_{1}^{2}}$
Explanation
(a) $d_{1} = 7\lambda_{1}\frac{D}{d}$
And $d_{2} = 7\lambda_{2}\frac{D}{d}$
$\therefore\ \frac{d_{1}}{d_{2}} = \frac{\lambda_{1}}{\lambda_{2}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.