[" 14.If an electron and a proton have t...

[" 14.If an electron and a proton have the same "KE" ,"],[" the ratio of the de Broglie wavelengths of "],[" proton and electron would approvimately be "],[[" 1) "1:1837" 2) "43:1," 3) "1837:1" 4) "1:43]]

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