If a proton and electron have the same de Broglie wavelength, then\

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Professor PC Thomas Classes · Answer

de Broglie wavelength, $\lambda=\frac{\mathrm{h}}{\mathrm{p}}$ Where p is the momentum of the particle. For $$ 	ext { electron } \lambda_{e}=\frac{h}{p_{e}} $$ For proton $\lambda_{\mathrm{p}}=\frac{\mathrm{h}}{\mathrm{p}_{\mathrm{p}}}$\ As $\lambda_{\mathrm{e}}=\lambda_{\mathrm{p}}$ (Given)\ $\Rightarrow \mathrm{p}_{\mathrm{e}}=\mathrm{p}_{\mathrm{p}}$\ or Momentum of electron $=$ Momentum of proton\