The frequency order of for `gamma`-rays (b) X-rays (a) UV-rays (c ):

Options

A. `b gt a gt c`
B. `a gt b gt c`
C. `c gt b gt a`
D. `a gt c gt b`

Answer

To determine the frequency order of gamma rays, X-rays, and UV rays, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Energy-Frequency Relationship**:
- The energy (E) of electromagnetic radiation is related to its frequency (ν) by the equation:
\[ E = h \nu \]
where \( h \) is Planck's constant.

2. **Identify the Energy Order**:
- Generally, the order of energy for electromagnetic waves from highest to lowest is:
- Gamma rays > X-rays > UV rays
- This means gamma rays have the highest energy, followed by X-rays, and then UV rays.

3. **Relate Energy to Frequency**:
- Since energy is directly proportional to frequency, we can conclude:
\[ \text{If } E \text{ is high, then } \nu \text{ is also high.} \]
- Therefore, the frequency order will follow the same order as the energy.

4. **Establish the Frequency Order**:
- Based on the energy order:
- Gamma rays (highest energy) correspond to the highest frequency.
- X-rays (medium energy) correspond to a medium frequency.
- UV rays (lowest energy) correspond to the lowest frequency.
- Thus, the frequency order is:
\[ \text{Gamma rays} > \text{X-rays} > \text{UV rays} \]

5. **Final Representation**:
- We can denote the frequency order as:
- Gamma rays (B) > X-rays (A) > UV rays (C)

### Conclusion:
The correct order of frequency is:
\[ \text{Gamma rays (B)} > \text{X-rays (A)} > \text{UV rays (C)} \]