Find the de Broglie wavelength of the electron in the first orbit.

Explanation

To find the de Broglie wavelength of the electron in the first orbit, we can follow these steps:

### Step 1: Understand the de Broglie wavelength formula
The de Broglie wavelength (\( \lambda \)) of a particle is given by the formula:
\[ \lambda = \frac{h}{mv} \]
where:
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