Molybdenum has a work function of 4.20 eV. What is the stopping potential if the incident light has a wavelength of 180 nm?
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A: Work function of lithium (Wo) = 2.95 eV
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A: Einstein's Photoelectric equation hν =ϕ0 + 12mV2hcλ =ϕ0 + 12mV2 Where…
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Q: When 250 nm light falls on a metal, the current through a photoelectric circuit (Figure 1) is…
A: Given data, Wavelength λ=250 nm=2500 A° Stopping potential V0=1.74 V
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A: Answer Given Uncertainty in frequency measurement ∆f = 17.4×106 Hz So the uncertainty in energy…
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Q: A metal surface is illuminated by light with a wavelength of 550 nmnm . The maximum kinetic energy…
A: We have maximum kinetic energy of emmited photons is given by KEmax=hυ−hυ0=hυ−Φ0work function of…
Q: Violet light of wavelength 400 nm ejects electrons with a maximum kinetic energy of 0.860 eV from…
A: The energy of radiation is, E=hcλE=4.41×10-153×108400×10-9E=3.11eV
Q: An x-ray source generates EM radiation with a wavelength of 45.0 pm (10-12 m). h = c =…
A: Photon energy is given by : E =hcλ = 1.98644586×10-2545x10-12 = 4.413x10-15 J Potential difference:…
Q: What is the energy (in eV) of the following photons? A 200-nm photon of ultraviolet light?
A: Given data: For a ultraviolet light, Photon's wavelength, λ=200 nm=2×10-7 m (∵1 nm=10-9 m)…
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- a. X ray are produced in a tube operating at 20.0 kV strikes a target and Compton- scattered through an angle of 90.0° What is the wavelength shift, AA. b. A beam of protons with have the same energy scatters from atoms that have a spacing of 0.150 nm in the crystal. The m- 2 intensity maximum occurs when the angle is 30.0°. Calculate the kinetic energy (in eV) of each beam.A single beam of electrons shines on a single slit of width 8.7nm. A diffraction pattern (of electrons!) is formed on a screen that is 3.9m away from the slit. The distance between the central bright spot and the first minimum is 5.7cm.What is the kinetic energy (keV, i.e. kilo electron-Volts) of the electrons?Make use of the small angle approximation.Light of wavelength 350 nm falls on a potassium surface, and the photoelectrons have amaximum kinetic energy of 1.3 eV.What is the work function of potassium?The speed of light is 3 × 108 m/s and Planck’sconstant is 6.63 × 10−34 J · s.Answer in units of eV. What is the threshold frequency for potassium?Answer in units of Hz.
- A metal surface has a photoelectric cutoff wavelength of 325.6 nm. It is illuminated with light of wavelength 259.8 nm. What is the stopping potential?A monochromatic light source illuminates the surface of metal X. The maximum kinetic energy of electrons leaving the surface of the metal is shown in the graph above.An ammeter is connected to the standard photoelectric effect circuit to measure the photoelectric current arising from the electrons moving between the cathode and anode of the vacuum tube containing the illuminated sample. The current is found to be 12.4mA when the metal is illuminated with a wavelength of 184.2nm.What is the energy (eV) of the photons striking metal X?A beam of UV light with a wavelength of 197 nm falls onto a metal cathode. The stopping potential necessary to stop any electrons from reaching the anode is 2.08 V. What is the work function (W) of the cathode surface measured in eV?