Given below are two statements. One is labelled as Assertion (A) and… | JEE Main 2025 (22 Jan, Shift 2)

Q13JEE Main 2025 · 22 JAN · SHIFT 2Easy

YDSE: Fringe Width & Fringe Positions

Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): In Young's double slit experiment, the fringes produced by red light are closer as compared to those produced by blue light.

Reason (R): The fringe width is directly proportional to the wavelength of light.

In the light of the above statements, choose the correct answer from the options given below:

Show answer and solution

Answer: (c)

R: $\beta = \frac{\lambda D}{d} \propto \lambda$ , true.
A: $\lambda_{red} > \lambda_{blue}$ , so red fringes are wider, not closer. A is false.
So the answer is (c).

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