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Which of the following has smallest de-Broglie wavelength? O2, H2 a proton or an electron.

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Which of the following has smallest de-Broglie wavelength? O2, H2 a proton or an electron.

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According to the de-Broglie equation λ = h /m×v ; for same value of velocity λ= 1/ m.

∴ O2 Molecule has shortest wavelength.

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