4-68. A 4.2-MeV photon is backscattered (0= 1809 by a electron. (a) What is the wavelength of the scattered photon? (b) What is the kinetic energy of the electron?
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- An electron is fired at a metal target, reaching a speed of 1.00 x 106 m/s. On impact, it rapidly decelerates to half that speed, emitting a photon in the process. Calculate the energy and the wavelength of the photon.An x ray with a wavelength of 0.100 nm collides with an electron that is initially at rest. The electrons final wavelength is 0.110 nm. What is the final kinetic energy of the electron?If a 7.0-keV photon scatters from a free proton at rest, what is the change in the photon's wavelength if the photon recoils at 90°?
- A photon with wavelength A 7.10 x 10 nm is incident on an electron that is initially at rest. If the photon scatters in the backward direction, what is the magnitude of the linear momentum of the electron just after the collision with the photon? (Just write the result in Sl units)According to this question, what is the threshold frequency and what is the kinetic energy of the ejected electron?a) Find the de Broglie wavelength of electrons moving with an average speed of 1.55 x 105 m/s. b) Suppose these electrons are described by a wave packet of width 2.55 nm. What is the uncertainty of the momentum of the electrons?