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What is the de-Broglie wavelength associ...

What is the de-Broglie wavelength associated with an electron,accelerated through a potential difference of 100 volts?

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Here V=100 V
`lambda=(h)/(p)=(1.227)/(sqrt(V)) nm`
`therefore lambda=(1.227)/(sqrt(100))nm`
Here ,de-Broglie wavelength of electron is of the order of wavelength of X-rays.
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