Question

Which of the following phenomena does not explain by wave nature of light.
(A) reflection
(B) diffraction
(C) photoelectric effect
(D) interference
(E) polarization
Choose the most appropriate answer from the options given below :

• A. E only
• B. C only
• C. B, D only
• D. A, C only

Answer 1

The Correct Option is B

The question asks us to identify which phenomenon among the given options is not explained by the wave nature of light. Let's analyze each option to determine this:

1. Reflection: This is a wave phenomenon where light bounces back from a surface. It is explained by the wave nature of light using the laws of reflection.
2. Diffraction: This occurs when light bends around obstacles or through small openings, creating patterns that can only be explained by its wave nature.
3. Photoelectric Effect: This phenomenon involves the emission of electrons from a metal surface when light shines on it. Unlike others, this effect is explained by the particle nature of light (photons), not its wave nature. Thus, this is not explained by the wave nature of light.
4. Interference: This occurs when two or more waves overlap and combine to form new wave patterns. The wave nature of light is essential to explain the interference patterns observed in experiments like the double-slit experiment.
5. Polarization: This phenomenon involves the orientation of oscillations in the light wave and is another clear aspect of the wave nature of light.

From the analysis above, the only phenomenon not explained by the wave nature of light is the photoelectric effect. This observation is key to the development of quantum mechanics where light is described as having both wave and particle properties.

Therefore, the most appropriate answer is: C only.

Answer 2

The photoelectric effect is the phenomenon in which electrons are ejected from the surface of a material when it is exposed to light. This effect cannot be explained by the wave nature of light. Instead, it provides strong evidence for the particle nature of light.
On the other hand, phenomena such as reflection, diffraction, interference, and polarization are well explained by the wave nature of light.