If the energy of an electron in the second Bohr orbit of H-atom is -E, what is the energy of the electron in the Bohr's first orbit?

Explanation

To solve the problem, we need to find the energy of the electron in the first Bohr orbit (E1) given that the energy in the second Bohr orbit (E2) is -E.

### Step-by-Step Solution:

1. **Understanding the Energy Formula**:
The energy of an electron in the nth orbit of a hydrogen atom is given by the formula:
\[
E_n = -\frac{E_0}{n^2}
...