Selected MCQ

Current Question
The cosmological redshift is due to:
  • A. Doppler motion only
  • B. Expansion of space
  • C. Gravitational collapse
  • D. Magnetic fields
Correct Answer: B
Explanation:
Light stretches as universe expands.
Related Question 1
The cosmological constant is associated with:
  • A. Gravity weakening
  • B. Dark energy
  • C. Dark matter
  • D. Nuclear force
Correct Answer: B
Explanation:
Cosmological constant models accelerated expansion.
Related Question 2
The Doppler effect for light leads to redshift when:
  • A. Source approaches observer
  • B. Source moves away
  • C. Observer moves toward source
  • D. Wavelength decreases
Correct Answer: B
Explanation:
Receding source increases wavelength (redshift).