JEE Main 2026 — Wave Optics Question with Solution
JEE Main 2026 (05 April Shift 1)
Question
In Young's double slit experiment, the fringe width of the interference pattern produced on the screen is m. If the experiment is carried out in another medium having refractive index , the fringe width will be _____ m.
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
The fringe width in Young's double slit experiment is given by .
When the experiment is performed in a medium of refractive index , the wavelength of light becomes .
The new fringe width is .
Substituting the given values, m and :
m.
Answer:
When the experiment is performed in a medium of refractive index , the wavelength of light becomes .
The new fringe width is .
Substituting the given values, m and :
m.
Answer:
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 2026, 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.