The electron in hydrogen atom passes form the n=4 energy level to the n=1 level. What is the maximum number of photons that can be emitted? and minimum number?

Explanation

To solve the problem of how many photons can be emitted when an electron in a hydrogen atom transitions from the n=4 energy level to the n=1 energy level, we need to determine both the maximum and minimum number of photons emitted during this transition.

### Step-by-Step Solution:

1. **Understanding the Energy Levels**:
- In a hydrogen atom, electrons occupy quantized energy levels denoted by n (principal quantum number). The levels are n=1, n=2, n=3, n=4, etc.

2. **Identifying the Transition**:
...