when an electron falls from a higher energy to a lower energy level the difference in the energies appears in the form of

Options

A. electromagnetic radiation only
B. thermal radiation only
C. both electromagnetic and thermal radiations
D. none of these

Explanation

To answer the question, we need to understand the process that occurs when an electron transitions from a higher energy level to a lower energy level. Here’s a step-by-step breakdown of the solution:

### Step-by-Step Solution:

1. **Understanding Energy Levels**:
- Electrons in an atom occupy specific energy levels (or shells). When an electron is in a higher energy level (E2) and moves to a lower energy level (E1), there is a difference in energy (ΔE).

2. **Calculating the Energy Difference**:
- The energy difference can be expressed as:
\[ \Delta E = E2 - E1 \]
- This difference represents the energy that is released when the electron transitions from the higher energy state to the lower energy state.

3. **Energy Release Mechanism**:
- When the electron falls to a lower energy level, the energy difference (ΔE) is not lost; instead, it is released in a specific form.

4. **Form of Energy Release**:
- The energy released during this transition is emitted in the form of electromagnetic radiation. This is due to the fact that an accelerating charged particle (like an electron) emits energy.

5. **Conclusion**:
- Therefore, when an electron falls from a higher energy level to a lower energy level, the difference in energy appears in the form of electromagnetic radiation.

### Final Answer:
The difference in the energies appears in the form of **electromagnetic radiation**.

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