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?
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- Photoelectric effect is observed on two metal surfaces. Light of wavelength 300.0 nm is incident on a metal that has a work function of 2.40 eV. What is the maximum speed of the emitted electrons? m/sLight of constant intensity but varying wavelength was used to illuminate the cathode in a photoelectriceffect experiment. The graph shows how the stopping potential depended on the frequency of the light. What is the work function, in eV, of the cathode?A photon of wavelength 200 nm is scattered by an electron that is initially at rest. Which one of the following statements concerning the wavelength of the scattered photon is true? Question 25 options: The wavelength is zero nm. The wavelength is greater than 200 nm. The wavelength is 200 nm. The wavelength is less than 200 nm, The wavelength is less than 100 nm but greater than zero.
- Your eyes have three different types of cones with maximum absorption at 437 nm, 533 nm, and 564 nm. What photon energies correspond to these wavelengths?A 100-W sodium-vapor lamp emits yellow light of wavelength 590 nm. Calculate the number of photons emitted per second.Potassium and gold cathodes are used in a photoelectric-effect experiment. For each cathode, find: The threshold frequency. The threshold wavelength. The maximum electron ejection speed if the light has a wavelength of 170 nm . The stopping potential if the wavelength is 170 nm . Throughout this problem, be sure to use 6.63×10−34J⋅s for Planck's constant. a) The maximum photoelectron ejection speed in meters per second for an electron ejected from potassium if the light has a wavelength of 170 nm. Express your answer in meters per second. b)The maximum photoelectron ejection speed in meters per second for an electron ejected from gold if the light has a wavelength of 170 nm . c)The stopping potential in volts for potassium if the wavelength is 170 nm. Express your answer in volts. d) The stopping potential in volts for gold if the wavelength is 170 nm. Express your answer in volts.
- Photons of wavelength 248.6 nm strike a metal whose work function is 3.5 eV. What is the KE of the most energetic photoelectron? a) 1.5 eV b) 2.5 eV c) 3.5 eV d) none of these.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 UnitsLight with a single wavelength of 490 nm impacts a metal surface releasing an electrons. How much energy in Joules is in each photo of this light? ________ What is the energy in eV of a photon whose wavelength is 490 nm?________ Light with a single wavelength of 490 nm impacts a metal surface releasing an electrons. If the released electrons each have an energy of 1.9 eV, what is the work function of the metal in eV? _____ f the light source were brought closer to the surface so that the light reaching the surface was brighter which would change? ______