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STD 12 - 10. Wave optics — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - 10. Wave optics4 Marks
MCQ
How does the red shift confirms that the universe is expanding
  • A
    Due to Wien's law
  • B
    Due to Stefan's law
  • C
    Due to Kirchhoff's law
  • ✓
    Due to Doppler's effect
✓

Answer

Correct option: D.
Due to Doppler's effect
d
(d)If the light received from galaxies indicates a shift towards the red end of spectrum of light, it means that the galaxies should be receding away (Doppler's effect). Therefore we conclude that the universe is expanding.

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