Wave-Particle Duality — Practice Quiz

Question 1

Davisson-Germer experiment (1927) established:

Accepted Answer

Electrons have wave nature

Answer

Photons exist

Answer

Atoms have nuclei

Answer

Spin quantization

Question 2

Which experiment best demonstrates the PARTICLE nature of light?

Accepted Answer

Photoelectric effect

Answer

Young's double slit

Answer

Newton's rings

Answer

Polarization

Question 3

de Broglie wavelength of an electron of momentum 6.6 × 10⁻²⁴ kg·m/s is:

Accepted Answer

0.1 nm

Answer

1 nm

Answer

10 nm

Answer

100 nm

Question 4

The wave nature of a cricket ball (m = 0.15 kg, v = 30 m/s) is undetectable because:

Accepted Answer

λ_dB is incredibly small (~10⁻³⁴ m)

Answer

Ball is not charged

Answer

Air resistance destroys waves

Answer

Cricket balls have no waves

Question 5

Complementarity principle (Bohr) states:

Accepted Answer

Wave and particle aspects are observed in different experiments, not simultaneously

Answer

Particles and waves are the same

Answer

Light has only wave nature

Answer

Matter has only particle nature