By corpuscular theory of light, the phenomenon which cannot be explained is

Options

A. Reflection
B. interference
C. diffraction
D. Polarisation

Answer

To solve the question regarding which phenomenon cannot be explained by the corpuscular theory of light, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Corpuscular Theory of Light**:
- The corpuscular theory, proposed by Isaac Newton, suggests that light is made up of tiny particles called "corpuscles" that travel in straight lines.

2. **Identify the Phenomena**:
- The question lists four phenomena: reflection, interference, diffraction, and polarization. We need to analyze each of these in the context of the corpuscular theory.

3. **Analyze Each Phenomenon**:
- **Reflection**: This phenomenon can be explained by the corpuscular theory. When light particles (corpuscles) hit a reflective surface, they bounce back, which aligns with the idea of straight-line motion.
- **Interference**: This phenomenon involves the superposition of waves and is best explained by the wave theory of light. The corpuscular theory does not adequately explain how two light beams can combine to create interference patterns.
- **Diffraction**: This phenomenon occurs when light waves bend around obstacles or spread out after passing through narrow openings. It is a wave property and cannot be explained by the corpuscular theory.
- **Polarization**: This phenomenon involves the orientation of light waves and is also explained by wave theory. The corpuscular theory does not account for the directional properties of light.

4. **Conclusion**:
- Among the given options, interference, diffraction, and polarization cannot be explained by the corpuscular theory of light. However, reflection can be explained. Therefore, the phenomenon that cannot be explained by the corpuscular theory is **interference**.

### Final Answer:
The phenomenon that cannot be explained by the corpuscular theory of light is **interference**.

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