What is the ratio of radii of orbits corresponding to first excited state and ground state in hydrogen atom?

Explanation

To find the ratio of the radii of orbits corresponding to the first excited state and the ground state in a hydrogen atom, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the States**:
- The ground state of a hydrogen atom corresponds to the principal quantum number \( n = 1 \).
- The first excited state corresponds to \( n = 2 \).

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