1 MeV equals

Options

A. `1.6xx10^(-19)` J
B. `1.6xx10^(-16)` J
C. `1.6xx10^(-13)` J
D. `1.6xx10^(13)` J

Answer

To find the value of 1 MeV (mega electron volt) in joules, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Electron Volt (eV)**:
- An electron volt (eV) is defined as the amount of energy gained by an electron when it is accelerated through a potential difference of 1 volt.
- Mathematically, 1 eV = 1.6 × 10^(-19) joules.

2. **Define Mega Electron Volt (MeV)**:
- The prefix "mega" means one million (10^6). Therefore, 1 MeV is equal to 1 million electron volts.
- Thus, 1 MeV = 1,000,000 eV.

3. **Convert MeV to Joules**:
- To convert MeV to joules, we can use the conversion factor for eV:
\[ 1 \text{ MeV} = 1,000,000 \text{ eV} = 1,000,000 \times (1.6 \times 10^{-19} \text{ joules}) \]

4. **Calculate the Value**:
- Performing the multiplication:
\[ 1 \text{ MeV} = 1.6 \times 10^{-19} \text{ joules} \times 10^6 = 1.6 \times 10^{-13} \text{ joules} \]

5. **Final Result**:
- Therefore, 1 MeV is equal to:
\[ 1 \text{ MeV} = 1.6 \times 10^{-13} \text{ joules} \]

### Conclusion:
1 MeV equals 1.6 × 10^(-13) joules.

---