Kinetic energy remaining the same, which of the two have greater de-Broglie wavelength proton or electron ? Explain.

Explanation

To determine which particle, a proton or an electron, has a greater de-Broglie wavelength when their kinetic energy remains the same, we can follow these steps:

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