Which of the following phenomenon could not be explained by wave nature of light?

Options

A. Interference
B. Diffraction
C. Black body radiation
D. Polarization

Answer

To solve the question "Which of the following phenomenon could not be explained by wave nature of light?", we will analyze each option provided in the question.

### Step 1: Understand the Phenomena
We need to evaluate the following phenomena:
1. Interference
2. Diffraction
3. Black body radiation
4. Polarization

### Step 2: Analyze Each Phenomenon
- **Interference**: This phenomenon occurs when two or more light waves overlap and combine to form a new wave pattern. It can be explained by the wave nature of light, as it involves the superposition of waves.

- **Diffraction**: This is the bending of light waves around obstacles or the spreading of light waves when they pass through narrow openings. This phenomenon can also be explained by the wave nature of light.

- **Black body radiation**: This refers to the electromagnetic radiation emitted by a perfect black body in thermal equilibrium. The classical wave theory could not explain the observed spectrum of black body radiation, leading to the development of quantum theory. Thus, this phenomenon cannot be explained by the wave nature of light.

- **Polarization**: This phenomenon occurs when light waves are restricted to vibrate in a particular direction. Polarization can be explained by the wave nature of light, as it involves the orientation of the electric field vector of the light wave.

### Step 3: Conclusion
From the analysis, we conclude that the phenomenon that could not be explained by the wave nature of light is **black body radiation**.

### Final Answer
The phenomenon that could not be explained by the wave nature of light is **black body radiation**.

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