Diffraction and interference of light refers to -

Options

A. Nature of light is electro-magnetic
B. Wave nature
C. Nature is quantum
D. Nature of light is transverse

Answer

To answer the question "Diffraction and interference of light refers to -", we need to analyze the concepts of diffraction and interference in the context of light.

### Step-by-Step Solution:

1. **Understanding Diffraction**:
- Diffraction refers to the bending of light waves around obstacles or the spreading of light waves when they pass through narrow openings. This phenomenon occurs due to the wave nature of light.

**Hint**: Remember that diffraction is a characteristic of waves, which allows them to bend and spread.

2. **Understanding Interference**:
- Interference is the phenomenon that occurs when two or more light waves overlap and combine, resulting in a new wave pattern. This can lead to constructive interference (bright spots) and destructive interference (dark spots) on a screen.

**Hint**: Think about how waves can add together to create a new pattern, which is a key aspect of interference.

3. **Nature of Light**:
- Light exhibits both wave and particle properties (wave-particle duality). However, diffraction and interference are primarily associated with the wave nature of light.

**Hint**: Recall that the wave nature of light is crucial for understanding phenomena like diffraction and interference.

4. **Conclusion**:
- Therefore, diffraction and interference of light refer to the wave nature of light. This means that these phenomena are observed when light behaves as a wave, leading to patterns that can be analyzed mathematically.

**Hint**: Focus on the fact that both diffraction and interference are manifestations of the wave behavior of light.

### Final Answer:
Diffraction and interference of light refer to the wave nature of light.