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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctMediumApplication

JEE Main 28 June 2022, Shift 2, Physics Q46

Question 46 of 90 in this shift, Physics question 16 of 30, Section A.

In young’s double slit experiment performed using a monochromatic light of wavelength λ\lambda, when a glass plate (μ\mu=1.5) of thickness xλx\lambda is introduced in the path of the one of the interfering beams, the intensity at the position where the central maximum occurred previously remains unchanged. The value of xx will be :
  1. (1)3
  2. (2)2Official answer
  3. (3)1.5
  4. (4)0.5

Official answer

Option 2

NTA final key.

Chapter
Wave Optics
Topic
Young's Double Slit
Idea tested
Fringe Shift by Thin Slab

Same idea in other shifts

Asked 3× in all
  1. 4 Apr 2026, Shift 2 · Q50In a double slit experiment, when one of the slits is covered by a transparent mica sheet of refractive index 1.56, the central fringe…MediumNumerical value
  2. 9 Apr 2024, Shift 2 · Q52Monochromatic light of wavelength 500500 nm is used in Young's double slit experiment. An interference pattern is obtained on a screen.…MediumNumerical value

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.