What must be the velocity of a beam of electron if they are to display a de Broglie wavelength of `1 Å`

Explanation

To find the velocity of a beam of electrons that displays a de Broglie wavelength of 1 Å (1 angstrom), we can follow these steps:

### Step-by-Step Solution:

1. **Identify Given Values**:
- De Broglie wavelength (λ) = 1 Å = \(1 \times 10^{-10}\) m
- Mass of an electron (m) = \(9.1 \times 10^{-31}\) kg
- Planck's constant (h) = \(6.626 \times 10^{-34}\) J·s
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