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What are the speed and de broglie wavel...

What are the speed and de broglie wavelength of an electron that has been accelerated by a potential difference of `500` ` V`?

Text Solution

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Since `1/2 "mu"^(2)=ev`
`:.u=((2eV)/m)^(1//2)=[(2xx1.602xx10^(-19)xx500)/(9.108xx10^(-31))]^(1//2)`
`=1.326~~10^(8)m"sec"^(-1)`
Also `lamda=h/("mu")`
`=(6.626xx10^(-34))/(9.108xx10^(-31)xx1.326xx10^(7))=5.5xx10^(-10)m`
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