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17 Nov 2019
Albert Einstein forever turned the physics world on its head by his suggestion that light comes in discrete packets of energy called photons. This came in the context of his explanation for a seminal experiment (see diagram of apparatus, at right) first described by German scientist Phillipp Lenard that has come to be known as the photoelectric effect. a. In 1921, Albert Einstein was awarded the Nobel Prize in Physics for his "discovery of the law of the photoelectric effect." In the space provided below, explain the photoelectric effect. You may write either a sentence or mathematical equation as your response. The energies associated with single photons are quite small and measured, accordingly, in electron-Volts (eV.) What is the energy (in eV) of a photon that has a wavelength of 633 nm is, ...? Recall that 1 eV = 1.602 times 10^-19 J. 0.02 eV 0.51 eV 1.96 eV 6.33 eV None of these b. The work function for gold metal is 4.82 eV. What is the frequency (in Hz) of a photon corresponding to this energy? Recall that 1 eV = 1.602 times 10^-19 J. 5.12 times 10^-52 8.58 times 10^-15 1.99 times 10^-14 1.10 times 10^-15 None of these c. The work function for platinum metal is 5.22 eV. At the velocity will electrons from platinum metal be ejected when the metal is irradiated with photons corresponding to an energy of 7.26 eV? Report your answer in the box provided with the correct number of significant figures. Show your work. A correct response without any justification (work) will receive no credit. Recall that m_e = 9. 109 times 10^-31 kg.
Albert Einstein forever turned the physics world on its head by his suggestion that light comes in discrete packets of energy called photons. This came in the context of his explanation for a seminal experiment (see diagram of apparatus, at right) first described by German scientist Phillipp Lenard that has come to be known as the photoelectric effect. a. In 1921, Albert Einstein was awarded the Nobel Prize in Physics for his "discovery of the law of the photoelectric effect." In the space provided below, explain the photoelectric effect. You may write either a sentence or mathematical equation as your response. The energies associated with single photons are quite small and measured, accordingly, in electron-Volts (eV.) What is the energy (in eV) of a photon that has a wavelength of 633 nm is, ...? Recall that 1 eV = 1.602 times 10^-19 J. 0.02 eV 0.51 eV 1.96 eV 6.33 eV None of these b. The work function for gold metal is 4.82 eV. What is the frequency (in Hz) of a photon corresponding to this energy? Recall that 1 eV = 1.602 times 10^-19 J. 5.12 times 10^-52 8.58 times 10^-15 1.99 times 10^-14 1.10 times 10^-15 None of these c. The work function for platinum metal is 5.22 eV. At the velocity will electrons from platinum metal be ejected when the metal is irradiated with photons corresponding to an energy of 7.26 eV? Report your answer in the box provided with the correct number of significant figures. Show your work. A correct response without any justification (work) will receive no credit. Recall that m_e = 9. 109 times 10^-31 kg.
Jamar FerryLv2
9 Nov 2019