Home/
Competitive Exams/
JEE Main & Advanced/
Physics/
Sound Waves/
Question 31294
JEE Physics · Hard

Sound Waves: Doppler Advanced MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
Doppler AdvancedHardQuestion 31294

Question

The Hubble redshift (recession of distant galaxies) is analogous to Doppler effect for light. Recession of galaxy at speed 0.01c gives fractional frequency shift Δf/f of approximately:
  1. A
    0.01
    Correct
  2. B
    0.001
  3. C
    0.1
  4. D
    1

Correct answer

0.01

Explanation

Δf/f ≈ v/c = 0.01c/c = 0.01 (classical Doppler for v << c). This is the redshift z ≈ 0.01 for that galaxy.

Review Sound Waves notesStart timed chapter practice