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The equivalent wavelength of a moving el...

The equivalent wavelength of a moving electron has the same value as that of a photon having an energy of `6 xx 10^(-17) J`. Calculate the momentum of the electron.

Text Solution

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E = Energy of the photon `=hv=(hc)/(lambda)`
`:. lambda=(hc)/(E)`
`:.` Wavelength of the moving electron `=lambda=(hc)/(E)`
`:.` Momentum of the electron =p
`=(h)/(lambda)=(hE)/(hc)=(E)/(c)`
`=(6xx10^(-17))/(3xx10^(8))kg ms^(-1)`
`=2xx10^(-25)kg ms^(-1)`
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