Q. In a Fraunhoffer diffraction at single slit of width $'d'$ with incident light of wavelength $5500\ \mathring{\mathrm{A}},$ the first minimum is observed, at angle $30{^\circ}$. The first secondary maximum is observed at an angle $\theta =$
A) $\sin^{- 1}\frac{1}{\sqrt{2}}$
B) $\sin^{- 1}\frac{1}{4}$
C) $\sin^{- 1}\frac{3}{4}$
D) $\sin^{- 1}\frac{\sqrt{3}}{2}$
Explanation
The correct answer is Option C: $\sin^{- 1}\frac{3}{4}$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.