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NEETPhysics-Wave Optics

NEET Physics Young's Double Slit Experiment MCQ Question

Type: MCQ-numerical-Medium-Class 12

In Young's double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths λ1=12000 A˚\lambda_1 = 12000 \text{ Å} and λ2=10000 A˚\lambda_2 = 10000 \text{ Å}. At what minimum distance from the common central bright fringe on the screen 2 m from the slit will a bright fringe from one interference pattern coincide with a bright fringe from the other?

A

4 mm

B

3 mm

C

8 mm

D

6 mm

Correct Answer

Option A

Detailed Explanation

The condition for coinciding bright fringes is given by the equation dsin⁡θ=nλd \sin \theta = n \lambda, where nn is the order of the fringe.

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