An α particle and a proton are accelerated from rest by a potential difference of 200 V. After this, their de Broglie wavelengths are λ_α and λ_p…

An $\displaystyle \alpha$ particle and a proton are accelerated from rest by a potential difference of $\displaystyle 200$ V . After this, their de Broglie wavelengths are $\displaystyle \lambda_\alpha$ and $\displaystyle \lambda_{\mathrm{p}}$ respectively. The ratio $\displaystyle \frac{\lambda_{\mathrm{p}}}{\lambda_\alpha}$ is :