According to the de-Broglie hypothesis,the wavelength associated with a moving electron of mass $m$ is $\lambda_e$. Using the mass-energy relation and Planck's quantum theory,the wavelength associated with a photon is $\lambda_p$. If the energy $(E)$ of the electron and the photon is the same,then the relation between $\lambda_e$ and $\lambda_p$ is:
- A$\lambda_p \propto \lambda_e$
- B$\lambda_p \propto \lambda_e^2$
- C$\lambda_p \propto \sqrt{\lambda_e}$
- D$\lambda_p \propto \frac{1}{\lambda_e}$
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