Diffraction and interference of light refers to -

Options

A. Nature of light is electromagnetic
B. Wave nature of light
C. Nature is quantum
D. Nature of light is transverse

Answer

To solve the question regarding what diffraction and interference of light refers to, we can break it down into the following steps:

### Step 1: Understanding the Concepts
- **Diffraction**: This is the phenomenon where light bends around the edges of an obstacle or aperture. It shows that light does not travel in straight lines but can spread out when encountering obstacles.
- **Interference**: This occurs when two or more waves overlap and combine to form a new wave pattern. This results in regions of constructive interference (bright fringes) and destructive interference (dark fringes).

### Step 2: Historical Context
- Initially, light was thought to behave like a stream of particles (photons) according to the particle theory of light. However, phenomena like diffraction and interference could not be explained by this theory.

### Step 3: Wave Theory of Light
- The observations of diffraction and interference led scientists to propose the wave theory of light. This theory posits that light behaves as a wave, which can explain the bending and overlapping of light waves.

### Step 4: Conclusion
- Based on the understanding of diffraction and interference, we conclude that these phenomena are indicative of the wave nature of light. Therefore, the correct answer to the question is that diffraction and interference of light refers to the wave nature of light.

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

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