What is the packet of energy called ?

Options

A. electrons
B. photon
C. positron
D. proton

Explanation

To answer the question "What is the packet of energy called?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Energy Packets**: In the context of quantum mechanics, energy is not emitted continuously but rather in discrete packets. These packets are fundamental to the understanding of electromagnetic radiation.

2. **Defining Photons**: According to quantum theory, these packets of energy are called "photons." A photon is the basic unit of light and all other forms of electromagnetic radiation.

3. **Emission of Photons**: When a hot body emits energy, it does so in the form of photons. This means that the energy emitted is quantized, and each photon carries a specific amount of energy.

4. **Electromagnetic Radiation**: Photons are not only limited to visible light but also include other forms of electromagnetic radiation such as ultraviolet light, infrared light, X-rays, and gamma rays.

5. **Conclusion**: Therefore, the correct answer to the question is that the packet of energy is called a "photon."

### Final Answer:
The packet of energy is called a **photon**.

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