The angular momentum of electron in a Bohr's orbit of H atom is `4.2178 xx 10^(-34) kg m^(2)s^(-1)` Calculate the wavelength of the spectral line when the electrton falls from this level to the next lower level

Explanation

To solve the problem, we need to calculate the wavelength of the spectral line when an electron falls from a higher energy level to a lower energy level in a hydrogen atom. We will follow these steps:

### Step 1: Identify the Energy Level
We are given the angular momentum of the electron in a Bohr's orbit:
\[ L = 4.2178 \times 10^{-34} \, \text{kg m}^2/\text{s} \]
The formula for the angular momentum in Bohr's model is:
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