Phenomenon of diffraction occurs

Options

A. only in case of light and sound waves
B. for all kinds of waves
C. for electro-magnetic waves and not for matter waves
D. for light waves only

Answer

### Step-by-Step Solution:

1. **Understanding Diffraction**:
- Diffraction is a phenomenon that occurs when waves encounter an obstacle or a slit that is comparable in size to their wavelength. This results in the bending and spreading of waves.

2. **Types of Waves**:
- Diffraction is not limited to light waves; it occurs for all types of waves, including sound waves, water waves, and electromagnetic waves.

3. **Factors Affecting Diffraction**:
- The extent of diffraction depends on two main factors:
- The size of the obstacle or aperture relative to the wavelength of the wave.
- The distance between the obstacle and the screen (or the point where the wave is being observed).

4. **Conclusion**:
- Since diffraction occurs for all kinds of waves, the correct answer to the question is that diffraction occurs for all types of waves.

### Final Answer:
- **Diffraction occurs for all kinds of waves.** (Option B)

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