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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 26 July 2022, Shift 1, Physics Q35

Question 35 of 90 in this shift, Physics question 5 of 30, Section A.

In Young's double slit experiment, the fringe width is 12 mm. If the entire arrangement is placed in water of refractive index 43\frac{4}{3}, then the fringe width becomes (in mm) :
  1. (1)16
  2. (2)9Official answer
  3. (3)48
  4. (4)12

Official answer

Option 2

NTA final key.

Chapter
Wave Optics
Topic
Young's Double Slit
Idea tested
Effect of Medium on Fringes

Same idea in other shifts

Asked 2× in all
  1. 5 Apr 2026, Shift 1 · Q39In Young's double slit experiment, the fringe width of the interference pattern produced on the screen is 2.4 μ2.4\ \mum. If the experiment…EasySingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.