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Electron and proton with the same kinetic energy: ratio of their de Broglie wavelengths

The same question, asked 2 times: 2021 Paper 13*, 11 Apr 2023. Every wording below, oldest first.

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  1. Question 1

    2021 Paper 13

    1
    Find the ratio of de Broglie wavelength of an electron and a proton having same Kinetic Energy. Given that the mass of electron is mem_{e} and proton is mpm_{p}.

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  2. Question 2

    11 Apr 2023

    102
    The ratio of the de-Broglie wavelengths of proton and electron having same kinetic energy: (Assume mp=me×1849m_{p}=m_{e}\times 1849 )

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