Post Utme Ksu 2018 Physics Question 20

Practice objective / multiple choice question 20 from the 2018 Post Utme Ksu Physics examination.

Post Utme Ksu 2018 Physics Objective / Multiple Choice
Question 20 POST_UTME_KSU • 2018 • PHYSICS • objective
Post Utme Ksu 2018 Physics Question 20 diagram

A light beam of wavelength $\lambda$ is incident on a dif\fraction grating of spacing $d$. If the first-order dif\fraction maximum occurs at an angle $\theta$ to the normal, find the value of $\theta$ in terms of $\lambda$ and $d$.

Answer Options

Correct Answer A. \sin \theta = \frac{m \lambda}{d}
B. \sin \theta = \frac{m \lambda}{2d}
C. \sin \theta = \frac{2m \lambda}{d}
D. \sin \theta = \frac{2m \lambda}{2d}
Correct Answer
A
Correct Option:
\sin \theta = \frac{m \lambda}{d}

About This Question

This is Post Utme Ksu 2018 Physics Question 20. It is one of the objective questions from the 2018 Post Utme Ksu Physics examination.

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