Electrons are emitted when a metal is illuminated by light with a wavelength less than 383 nm. Part A What is the metal's work function? ΜΕ ΑΣΦ E = Submit Request Answer Provide Feedback ? eV
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- A gold cathode is illuminated with light of wavelength 250 nm. It is found that the current is zero when ΔV = 1.0 V. Would thecurrent change ifa. The light intensity is doubled?b. The anode-cathode potential difference is increased to ΔV = 5.5 V?A beam of 150 eV electrons are directed at normal incidence onto a crystal surface. The m = 2 intensity maximum occurs at an angle 50.0°. What is the spacing between adjacent atoms on the surface? A. 1.00 x 10-10 m. B. 2.61 x 10-10. m. C. 3.70 x 10-8 m. D. 4.27 x 10-8 m.When x-rays of wavelength of 0.129 nm are incident on the surface of a crystal having a structure similar to that of NaCl, a first-order maximum is observed at 8.15°. Calculate the interplanar spacing based on this information. nm Need Help? Read It
- When illuminating a metal work function W = 1.6 eV with a radiation of wavelength 700 nm., we immediately observe electrons near the metal surface A. True B. FalseIf violet light of wavelength 375 nm illuminates a metal, what voltage will completely stop the flow of electrons from the surface?Barium has a work function of 2.48 eV. 1. a) What is the maximum kinetic energy of electrons if the metal is illuminated by UV light of wavelength 365 nm? 2. b) What is their speed?
- Problem 4: Ruby lasers have chromium atoms doped in an aluminum oxide crystal. The energy level diagram for chromium in a ruby is shown in the figure. Part (a) What energy photons can pump chromium atoms in a ruby laser from the ground state to its second excited state in eV? Part (b) What is the wavelength of this photon in nm? Part (c) What part of the visible light spectrum is it?False A Si photo-detector has a length of L= 10 um and a hole lifetime of t, =1x 10° s. If a voltage of 5 V is applied across the detector length, the detector gain "G" at the applied voltage will be: %3D Select one: O A. Gph = 2.925 B. Gph = 25.000 C. Gph = 4.000 %3! D. Gph = 10.000 %3D E. Gph = 1.250A metal surface is illuminated by light with a wavelength of 350 nm. The maximum kinetic energy of the emitted electrons is found to be 1.50 eV 1 What is the longest wavelength…
- A 3.00 eV electron has energy equal to? ______ JQ3: The below table lists diffraction angles for the first three peaks (third -order) of the x-ray diffraction pattern for some metal. Monochromatic x-radiation having a wavelength of (a) Determine the lattice constant. (b) radius of atoms. (0.1234 nm) was used for FCC crystal ? Peak miller Diffraction Number indies Angle (2e) 1 101 88 100 98 3 111 108A pair of silver plates in a vacuum are separated by 1 cm and have a potential difference of 2.0 kV between them. What is the largest wavelength of light that can be shined on the cathode to produce a current through the anode?A. 1.2 x 10-11 mB. 8.0 x 10-11 mC. 9.8 x 10-11 mD. 6.2 x 10-10 mE. 1.2 x 10-9 m
