State the speed of each of `alpha`, `beta` and `gamma` radiations.

Answer

To answer the question regarding the speed of alpha, beta, and gamma radiations, we can break down the solution into clear steps:

### Step-by-Step Solution:

1. **Identify the Types of Radiation**:
- We have three types of radiation to consider: alpha radiation, beta radiation, and gamma radiation.

2. **State the Speed of Alpha Radiation**:
- Alpha particles are relatively heavy and consist of 2 protons and 2 neutrons (essentially a helium nucleus).
- The speed of alpha radiation is approximately \( 10^7 \) meters per second.

3. **State the Speed of Beta Radiation**:
- Beta particles are much lighter than alpha particles and are similar to electrons.
- The speed of beta radiation is approximately \( 2 \times 10^8 \) meters per second.

4. **State the Speed of Gamma Radiation**:
- Gamma radiation consists of electromagnetic waves, which are massless.
- The speed of gamma radiation is approximately \( 3 \times 10^8 \) meters per second, which is the speed of light.

5. **Summarize the Speeds**:
- To summarize:
- Speed of alpha radiation: \( 10^7 \) m/s
- Speed of beta radiation: \( 2 \times 10^8 \) m/s
- Speed of gamma radiation: \( 3 \times 10^8 \) m/s

### Final Answer:
- **Alpha Radiation Speed**: \( 10^7 \) m/s
- **Beta Radiation Speed**: \( 2 \times 10^8 \) m/s
- **Gamma Radiation Speed**: \( 3 \times 10^8 \) m/s