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Saturday, 31 October

JEE Main 2025 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 3 April 2025, Shift 2, Physics Q42

Question 42 of 75 in this shift, Physics question 17 of 25, Section A.

A monochromatic light of frequency 5×10145 \times 10^{14} Hz travelling through air, is incident on a medium of refractive index '2'. Wavelength of the refracted light will be :
  1. (1)300 nmOfficial answer
  2. (2)400 nm
  3. (3)500 nm
  4. (4)600 nm

Official answer

Option 1

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. 27 Jun 2022, Shift 2 · Q47If a wave gets refracted into a denser medium, then which of the following is true?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.