An electron, an `alpha`-particle and a proton have the same kinetic energy. Which of these particles has the largest de-Broglie wavelength?

Explanation

To determine which particle among an electron, an alpha particle, and a proton has the largest de-Broglie wavelength when they all have the same kinetic energy, we can follow these steps:

### Step 1: Write the de-Broglie wavelength formula
The de-Broglie wavelength (λ) is given by the formula:
\[ \lambda = \frac{h}{p} \]
where \(h\) is Planck's constant and \(p\) is the momentum of the particle.
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