Q. The fringe width a distance of 50 cm from the slits in Young’s experiment for light of wavelength 6000 $\mathring{\mathrm{A}}$ is 0.048 cm. The fringe width at the same distance for $\lambda = 5000\ \mathring{\mathrm{A}}$ will be

A) 0.04 cm
B) 0.4 cm
C) 0.14 cm
D) 0.45 cm
Explanation

(a) $\beta^{'} = \frac{\lambda^{'}}{\lambda}\beta = \frac{5000}{6000} \times 0.48 = 0.04$cm

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

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