Energy is absorbed when the electron jumps from K to L energy sheels.

Explanation

**Step-by-Step Solution:**

1. **Understanding Energy Levels:**
- Atoms have different energy levels, often referred to as shells or orbits. The closest shell to the nucleus is called the K shell, followed by the L shell, and so on. Each shell has a specific energy associated with it.

2. **Identifying the Transition:**
- In the question, we are considering the transition of an electron from the K shell (which is the first energy level) to the L shell (the second energy level).

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