Dual nature of radiation — NEET & JEE Questions

Question 1 · difficulty L1 · recall

The dual nature of radiation means light can exhibit

• A. both wave-like and particle-like behaviour
• B. only wave behaviour
• C. only classical particle behaviour
• D. neither interference nor photoelectric effects

Question 2 · difficulty L1 · understanding

A photon of frequency f has energy

• A. h/f
• B. hf
• C. fc
• D. hfc

Question 3 · difficulty L2 · understanding

Photon momentum is

• A. p=hλ
• B. p=λ/h
• C. p=h/λ
• D. p=hf²

Question 4 · difficulty L2 · application

Which phenomenon most directly demonstrates the wave nature of light?

• A. Photoelectric threshold frequency
• B. Discrete photon energy transfer
• C. Electron emission from a metal
• D. Interference

Question 5 · difficulty L2 · understanding

Which observation most directly demonstrates the particle nature of electromagnetic radiation?

• A. Photoelectric effect
• B. Young's interference fringes
• C. Single-slit diffraction
• D. Polarisation of light

Question 6 · difficulty L3 · application

Which phenomenon strongly supports the particle nature of light?

• A. Photoelectric effect
• B. Young's double-slit interference only
• C. Diffraction around an aperture
• D. Polarisation alone

Question 7 · difficulty L3 · application

If photon frequency doubles, its energy

• A. halves
• B. doubles
• C. quadruples
• D. is unchanged

Question 8 · difficulty L3 · application

A photon has frequency $6.0\times10^{14}$ Hz. Taking $h=6.63\times10^{-34}$ J s, its energy is closest to

• A. $4.0\times10^{-19}$ J
• B. $1.1\times10^{-48}$ J
• C. $9.1\times10^{-31}$ J
• D. $6.6\times10^{-14}$ J

Question 9 · difficulty L3 · application

If the frequency of electromagnetic radiation is doubled, the energy of each photon becomes

• A. twice as large
• B. four times as large
• C. half as large
• D. unchanged

Question 10 · difficulty L4 · analysis

If photon wavelength halves, its momentum

• A. halves
• B. quadruples
• C. doubles
• D. is unchanged