Question

Which of the following phenomena cannot be explained by the wave theory of light?

• A. Reflection of light
• B. Diffraction of light
• C. Refraction of light
• D. Compton effect

Hint:

The Compton effect provides strong evidence for the particle nature of light, as it demonstrates energy and momentum transfer between photons and electrons.

Answer 1

The Correct Option is D

The wave theory of light successfully explains phenomena such as: 
- Reflection: Wavefront bending at an interface. 
- Refraction: Change in speed and bending of light at different media. 
- Diffraction: Spreading of waves when they encounter obstacles. 
However, the Compton effect involves the scattering of photons by electrons, which requires the particle nature of light (photons) and cannot be explained by the wave theory. 
Instead, it is explained using quantum mechanics.