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Calculate the wavelength of an electron ...

Calculate the wavelength of an electron moving with a velocity of `2.05xx10^7ms^(-1)`

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Mass of electron `=9.1xx10^(-31)`kg `lambda=h/(mV)=(6.626xx10^(-31))/(9.1xx10^(-31)xx2.05xx10^7)=3.55xx10^(11)m`
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