Selected MCQ

Current Question
The Compton effect demonstrates:
  • A. Wave nature of electrons
  • B. Particle nature of light
  • C. Gravitational redshift
  • D. Thermal radiation only
Correct Answer: B
Explanation:
Photon scattering shows momentum transfer like particles.
Related Question 1
Which phenomenon demonstrates quantization of angular momentum?
  • A. Diffraction
  • B. Zeeman effect
  • C. Photoelectric effect
  • D. Reflection
Correct Answer: B
Explanation:
Zeeman splitting arises from quantized angular momentum states.
Related Question 2
The Compton wavelength is inversely proportional to:
  • A. Charge
  • B. Mass
  • C. Velocity
  • D. Frequency
Correct Answer: B
Explanation:
(\lambda = h/mc), inversely dependent on mass.
Related Question 3
Which gas contributes most to greenhouse effect after water vapor?
  • A. Methane
  • B. CO₂
  • C. Ozone
  • D. Nitrogen
Correct Answer: B
Explanation:
CO₂ is major anthropogenic greenhouse gas.
Related Question 4
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).
Related Question 5
Which greenhouse gas has the greatest current overall contribution to the natural greenhouse effect?
  • A. Argon
  • B. Water vapor
  • C. Neon
  • D. Helium
Correct Answer: B
Explanation:
Water vapor is the most abundant and influential natural greenhouse gas.