Which of the following phenomenon does not support the particle nature of electromagnetic radiation?

Options

A. Photoelectric effect
B. Line spectrum of hydrogen
C. Interference
D. Blackbody radiation

Answer

To determine which phenomenon does not support the particle nature of electromagnetic radiation, we will analyze each of the given options:

1. **Photoelectric Effect**:
- The photoelectric effect demonstrates the particle nature of light. When light (photons) strikes a metal surface, it can eject electrons if the photons have enough energy to overcome the work function of the metal. This phenomenon shows that light behaves as a stream of particles (photons) that can transfer energy to electrons.

2. **Line Spectrum of Hydrogen**:
- The line spectrum of hydrogen also supports the particle nature of light. When electrons in a hydrogen atom transition between energy levels, they emit or absorb photons of specific energies (quantized). This emission or absorption of photons indicates that light consists of discrete packets of energy, reinforcing the particle theory.

3. **Interference**:
- Interference is a phenomenon that arises from the wave nature of light. It occurs when two or more waves overlap and combine to form a new wave pattern. This behavior cannot be explained by the particle theory, as it relies on the superposition principle of waves. Therefore, interference does not support the particle nature of electromagnetic radiation.

4. **Blackbody Radiation**:
- Blackbody radiation supports the particle nature of light as well. It describes how a perfect blackbody absorbs and emits electromagnetic radiation. The quantization of energy levels in the emitted radiation (explained by Planck's law) indicates that energy is emitted in discrete packets (photons).

Based on the analysis above, the phenomenon that does not support the particle nature of electromagnetic radiation is **Interference**.

### Final Answer:
**Interference** does not support the particle nature of electromagnetic radiation.