Wave theory cannot explain the phenomena of
A. Polarization , B.Diffraction
C. Compton effect , D. Photoelectric effect
Which of the following is correct ?

Options

A. A and B
B. B and D
C. C and D
D. D and A

Explanation

To solve the question "Wave theory cannot explain the phenomena of", we need to analyze the four options provided: A. Polarization, B. Diffraction, C. Compton effect, D. Photoelectric effect.

### Step 1: Understand the Wave Theory of Light
The wave theory of light explains various phenomena associated with light behaving as a wave. This includes concepts like interference, diffraction, and polarization.

### Step 2: Analyze Each Option
- **A. Polarization**: This phenomenon can be explained by wave theory. Polarization refers to the orientation of the oscillations of light waves.
- **B. Diffraction**: This is another phenomenon that can be explained by wave theory. Diffraction occurs when light waves bend around obstacles or spread out after passing through narrow openings.
- **C. Compton Effect**: This effect involves the scattering of photons (light particles) by electrons, demonstrating the particle nature of light. It cannot be explained by wave theory alone.
- **D. Photoelectric Effect**: This phenomenon occurs when light shines on a material and ejects electrons from it. It also cannot be explained by wave theory and requires the particle theory of light.

### Step 3: Identify Which Phenomena Cannot Be Explained by Wave Theory
From the analysis:
- Polarization (A) and Diffraction (B) can be explained by wave theory.
- Compton Effect (C) and Photoelectric Effect (D) cannot be explained by wave theory.

### Conclusion
The correct answer to the question is that wave theory cannot explain the phenomena of:
**C. Compton effect and D. Photoelectric effect.**

Since the question asks for which of the following is correct, the answer is:
**C. Compton effect and D. Photoelectric effect.**

### Final Answer
Wave theory cannot explain the phenomena of:
**C. Compton effect and D. Photoelectric effect.**

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