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Crystal diffraction experiments can be p...

Crystal diffraction experiments can be performed using X-rays, or electrons accelerated through appropriate voltage. Which probe has greater energy? (For quantitative comparison, take the wavelength of the probe equal to `1 Å`, which is of the order of inter-atomic spacing in the lattice) `(m_(e) =9.11 × 10^(-31) kg).`

Text Solution

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For `lambda=1Å` electron’s energy `= 150 eV`, photon.s energy `= 12.4 keV`. Thus, for the same wavelength, a photon has much greater energy than an electron.
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