JEE Main 2025PhysicsWave OpticsEasyMCQ

JEE Main 2025Wave Optics Question with Solution

JEE Main 2025 (22 Jan Shift 1)

Question

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion-(A) : If Young's double slit experiment is performed in an optically denser medium than air, then the consecutive fringes come closer. Reason-(R) : The speed of light reduces in an optically denser medium than air while its frequency does not change. In the light of the above statements, choose the most appropriate answer from the options given below :

Choose an option

Show full solutionCorrect option: B
Correct answer
BBoth and are true and is the correct explanation of

Step-by-step explanation

In denser medium, fringe come closer Also, Frequency remains same,

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the Wave Optics chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

About this question

This is a previous-year question from JEE Main 2025, covering the Wave Optics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.