Selected MCQ

Current Question
Which phenomenon cannot be explained by classical physics?
  • A. Reflection
  • B. Refraction
  • C. Blackbody radiation spectrum
  • D. Sound waves
Correct Answer: C
Explanation:
Classical theory fails to explain ultraviolet catastrophe.
Related Question 1
Which phenomenon is explained by spontaneous symmetry breaking?
  • A. Refraction
  • B. Superconductivity
  • C. Diffusion
  • D. Reflection
Correct Answer: B
Explanation:
Superconductivity arises from broken gauge symmetry.
Related Question 2
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 3
Which phenomenon proves quantization of charge?
  • A. Photoelectric effect
  • B. Millikan oil drop experiment
  • C. Compton scattering
  • D. Interference
Correct Answer: B
Explanation:
Oil drop experiment measured discrete electron charge.
Related Question 4
In plasma physics, Debye length represents:
  • A. Particle velocity
  • B. Screening distance of electric fields
  • C. Temperature gradient
  • D. Magnetic field strength
Correct Answer: B
Explanation:
Debye length defines electrostatic screening scale.
Related Question 5
Which phenomenon confirms existence of neutrinos?
  • A. Photoelectric effect
  • B. Beta decay energy spectrum
  • C. Reflection
  • D. Diffraction
Correct Answer: B
Explanation:
Missing energy in beta decay led to neutrino hypothesis.