An electron beam can undergo diffraction by crystals. Through what potential should a beam of electrons be accelerated so that its wavelength becomes equal to 1.54 Å.

An electron beam can undergo diffraction by crystals. Through what pot

1.	An electron beam can undergo diffraction by crystals. Through what potential should a beam of electrons be accelerated so that its wavelength becomes equal to 1.54 Å.
Answer» rmine: The POTENTIAL required for a beam of electrons to be accelerated so that its wavelength becomes .GIVEN Data: Constants: Planck's constant, Charge of an electron, MASS of an electron Formulas to be used:1) Kinetic energy of an electron in terms of mass m and speed 'U' of the electron 2) Kinetic energy of an electron in terms of potential, 3) Wavelength, CALCULATION:Step 1: Equating the formulas (1) and (2), and substituting u in terms of using formula (3) we get