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Friday, 9 October

JEE Main 2025 · PhysicsMultiple choiceSingle correctMediumApplication

JEE Main 2 April 2025, Shift 1, Physics Q40

Question 40 of 75 in this shift, Physics question 15 of 25, Section A.

A light wave is propagating with plane wave fronts of the type x+y+z=constantx+y+z=\text{constant}. The angle made by the direction of wave propagation with the xx-axis is :
  1. (1)cos⁡−1(23)\cos^{-1}\left(\sqrt{\frac{2}{3}}\right)
  2. (2)cos⁡−1(13)\cos^{-1}\left(\frac{1}{3}\right)
  3. (3)cos⁡−1(23)\cos^{-1}\left(\frac{2}{3}\right)
  4. (4)cos⁡−1(13)\cos^{-1}\left(\frac{1}{\sqrt{3}}\right)Official answer

Official answer

Option 4

NTA final key.

Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

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 42 of the 174 JEE Main shifts held from 2017 to 2026.