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Calculate the wavelength of an electron ...

Calculate the wavelength of an electron moving with a velocity of `2.05 xx 10^7 ms^(-1)`.

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According to de-Broglie equation
`lambda=h/(mv)=(6.626 xx 10^(-34))/(9.109 xx 10^(-31) xx 2.05 xx 10^7)`
`=3.55 xx 10^(-11)m`
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