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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyConceptual

JEE Main 27 June 2022, Shift 2, Physics Q47

Question 47 of 90 in this shift, Physics question 17 of 30, Section A.

If a wave gets refracted into a denser medium, then which of the following is true?
  1. (1)wavelength, speed and frequency decreases.
  2. (2)wavelength increases, speed decreases and frequency remains constant.
  3. (3)wavelength and speed decreases but frequency remains constant.Official answer
  4. (4)wavelength, speed and frequency increases.

Official answer

Option 3

NTA final key.

Chapter
Wave Optics
Topic
Refraction and Snell's Law
Idea tested
Invariance of Frequency in Refraction

Same idea in other shifts

Asked 2× in all
  1. 3 Apr 2025, Shift 2 · Q42A monochromatic light of frequency 5×10145 \times 10^{14} Hz travelling through air, is incident on a medium of refractive index '2'.…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.