Physics · Wave Optics

JEE Main 2024 — 27 January, Shift 2 — Question 56

A parallel beam of monochromatic light of wavelength $5000\$ is incident normally on a single narrow slit of width 0.001 mm . The light is focused by convex lens on screen, placed on its focal plane. The first minima will be formed for the angle of diffraction of (degree).

Answer: 30

Numerical answer — enter this value.

Step-by-step solution

For first minima a $\sin \theta=\lambda$

$\Rightarrow \sin \theta=\frac{\lambda}{\mathrm{a}}=\frac{5000 \times 10^{-10}}{1 \times 10^{-6}}=\frac{1}{2}$

$\Rightarrow \theta=30^{\circ}$

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Exam: JEE Main 2024
Paper: 27 January, Shift 2
Subject: Physics
Chapter: Wave Optics
Topic: Diffraction of Light Waves

When a polaroid sheet is rotated between two crossed polaroids then the transmitted light intensity will be maximum for a rotation of :

Answer: 30

Step-by-step solution

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