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A proton and an electron are accelerated by the same potential difference. Let \( \lambda_{\mathrm{e}} \) and \( \lambda_{\mathrm{p}} \) denote the de-Broglie wavelengths of the electron and the proton respectively.
(a) \( \lambda_{\mathrm{e}}=\lambda_{\mathrm{p}} \)
(b) \( \lambda_{\mathrm{e}}\lambda_{\mathrm{p}} \)
(c) \( \lambda_{\mathrm{e}}\lambda_{\mathrm{p}} \)
(d) \( \lambda_{\mathrm{e}} \) and \( \lambda_{\mathrm{p}} \) depends on the accelerating potential difference
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