Determine the de Broglie wavelength for a 54-eV electron used by Davisson and Germer.
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Determine the de Broglie wavelength for a 54-eV electron used by Davisson and Germer.
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- Calculate the de Broglie wavelength (in nm) for a proton with KE = 1 eV Oλ = 0.0287 nm Ол O λ = 2.87 nm Oλ = 28.7 nm λ = 0.287 nmLearning Goal: To understand de Broglie waves and the calculation of wave properties. In 1924, Louis de Broglie postulated that particles such as electrons and protons might exhibit wavelike properties. His thinking was guided by the notion that light has both wave and particle characteristics, so he postulated that particles such as electrons and protons would obey the same wavelength-momentum relation as that obeyed by light: \ =h/p, where X is the wavelength, p the momentum, and h Planck's constant. X = 1.06×10-34 Submit Correct m Previous Answers -14 As a comparison, an atomic nucleus has a diameter of around 10 m. Clearly, the wavelength of a moving baseball is too small for you to hope to see diffraction or interference effects during a baseball game. Part C Consider a beam of electrons in a vacuum, passing through a very narrow slit of width 2.00 μm. The electrons then head toward an array of detectors a distance 0.9540 m away. These detectors indicate a diffraction pattern,…An electromagnetic beam with wavelength do is incident upon an unknown metal. If electrons are ejected with maximum kinetic energy K, what is the work function of the metal? No a) hc/λo b) hλo/c c) hc/20-K d) hλo/c-K
- A 100-W sodium-vapor lamp emits yellow light of wavelength 590 nm. Calculate the number of photons emitted per second.In a photoelectric effect experiment, the maximum wavelength of the photons for which electrons are emitted is 342 nm. Calculate the work function of the target, in electronvolts. Maximum wavelength corresponds to when the electrons emitted do not have any kinetic energy.Chapter 38, Problem 039 Through what angle must a 160 kev photon be scattered by a free electron so that the photon loses 12% of its energy? The electron Compton wavelength is 2.43 x 10-12 m. Number Units