A proton and an a-particle have the same de-Broglie wavelength. Determine the ratio of
their accelerating potentials

Explanation

To solve the problem of determining the ratio of the accelerating potentials of a proton and an alpha particle that have the same de-Broglie wavelength, 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:
\[ \lambda = \frac{h}{p} \]
where \( h \) is Planck's constant and \( p \) is the momentum of the particle.
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