Define photoelectric effect. b) The work function for a silver surface is W = 4.74 eV. Calculate the i. minimum frequency that light must have to eject electrons from the surface. ii. maximum wavelength that light must have to eject electrons from the surface.
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5. a) Define
b) The work function for a silver surface is W = 4.74 eV. Calculate the
i. minimum frequency that light must have to eject electrons from the surface.
ii. maximum wavelength that light must have to eject electrons from the surface.
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- Helium was first discovered when astronomers viewed the spectrum from the Sun and could not associate absorption lines associated with any terrestrial element. One wavelength that was strongly absorbed was 587.5 nm (1 nm = 1.0×10-9 m). What is the energy associated with this wavelength of light? a. 1.06 eV (or 1.70×10-19 J) b. 0.943 eV (or 1.51×10-19 J) c. 2.11 eV (or 3.38×10-19 J) d. 0.472 eV (or 7.57×10-20 J)Orange light with a wavelength of 6.00 x 10^2 nm is directed at a metallic surface with a workfunction of 1.60 eV. Determine the following:a. the maximum kinetic energy of the emitted electrons, in joules. b. the maximum speed of the emitted electrons. c. the potential required to stop these electrons.QUESTION 10 Which of these expressions would yield the wavelength of light in meters emitted when an electron drops from orbit n = 3 to n = 2 in a Bohr hydrogen atom? Given h = 4.14 x 10-15 eVs and c = 3.00 x 108 m/s. a. hc/1.89 b. 1.89 x h x c c. 1.89/hxc d. (1.51 + 3.4)/hc e. hc/3.4
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