Question 31: NCERT Solutions for 12th Class Physics: Chapter 11-Dual Nature of Radiation and Matter
Crystal diffraction experiments can be perfor- med using X-rays, or electrons accelerated through appropriate voltage. Which probe has greater energy? An X-ray photon or the electron? (For quantitative comparison, take the wavelength of the probe equal to 1 A, which is of the order of inter-atomic spacing in the lattice) (me = 9.11 × 10-31 kg).
Order of interatomic spacing is 1 A in the crystal lattice. So, for diffraction to take place the wavelength should be of the same . order. For X-ray photon (energy for wavelength of 1 A)
Thus in order to produce same wavelength X-ray photon should have higher energy than electron.
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NCERT Solutions for 12th Class Physics: Chapter 11-Dual Nature of Radiation and Matter