Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
12th Edition
ISBN: 9781259587399
Author: Eugene Hecht
Publisher: McGraw-Hill Education
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Chapter 44, Problem 20SP
To determine
The longest wavelength of the photon that ejects an electron from
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The work function of a metal is 2.29 x 10-19 J. In a photoelectric effect experiment, calculate the maximum speed of the electrons emitted, in meters per second, when blue light is used (λ = 0.461 μm). Use three significant figures in your answer.
An atom (not a hydrogen atom) absorbs a photon whose associated wavelength is 375 nm and then immediately emits a photon whose associated wavelength is 580 nm. How much net energy is absorbed by the atom in this process?
In a particular case of Compton scattering, a photon collides with a free electron and scatters backwards. The wavelength after the collision is exactly double the wavelength before the collision. What is the wavelength of the incident photon? (mel = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ∙ s, c = 3.00 × 108 m/s)
Group of answer choices
1.2 pm
4.8 pm
3.6 pm
2.4 pm
Chapter 44 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
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- When a hydrogen atom is in its ground state, what are the shortest and longest wavelengths of the photons it can absorb without being ionized?arrow_forwardLight with a frequency of 3.00 x 10^15 ejects electrons from the surface of platinum, which has a work function of 6.50 ev. What is the minimum de Broglie wavelength of the ejected electrons?arrow_forwardAn argon laser emits a beam of light of wavelength 4.88 × 10-7 m, the power in the beam being 100mW. How many photons per second are emitted by the laser? If the beam falls on the cesium cathode of a photocell, what photoelectric current would be observed, assuming 10% of the photons are able to eject an electron?Given that the limiting frequency v0 of cesium is 5.2 × 1014Hz, what reverse potential difference between the cell electrodes is needed to suppress the photocell current?arrow_forward
- Gaseous calcium atoms absorb light at 423, 272, and 240 nm. After a photon of 272 nm is absorbed from the ground state, a photon of wavelength 672 nm is emitted. After absorption of a photon of 240 nm occurs from the ground state, a photon is emitted of wavelength 504 nm. After the 504 nm photoemission occurs, what wavelength of light (in nm) would have to be emitted for an electron to return to the ground state? Construct an energy diagram to help.arrow_forwardA ground-state H-atom (n = 1) first absorbs a photon with a wavelength of 95.0 nm and then emits a photon of 434 nm. What is the final state (n-value) for the electron?arrow_forwardWhich statement regarding the photoelectric effect is FALSE? Electrons can be ejected with energy of light used to strike the surface of the metals greater than the threshold energy. The current decreases with decreasing intensity of the light. The number of electrons ejected is proportional to the number of photons striking the metal surface. The wavelength limit sufficient for electron ejection is the same for all metals.arrow_forward
- thanks. The work function of sodium is 2.3 eV. What is the longest wavelength that can cause photoelectric emission? What should be the stopping potential if the sodium atom is illuminated by light of λ = 400 nm?arrow_forwardWhat is the stopping potential of an electron that has 7.30 × 101º J of kinetic energy in a photoelectric cell? 0.200 eV (A) (В) (C) 0.200 V 4.56 eV 4.56 V Light of a particular wavelength is incident on a metal surface. If electrons are emitted from this surface, what situation would result in more electrons per unit time with less kinetic energy per electron? Intensity Wavelength (A) decrease decrease (B) decrease increase (C) increase decrease (D) increase increasearrow_forwardElectrons in an x-ray tube accelerate through a potential difference of 10.0 kV before striking a target. If an electron produces one photon on impact with the target, what is the minimum wavelength of the resulting x rays? Find the answer by expressing energies in both SI units and electron volts.arrow_forward
- A photon with an energy of 2.28 eV is barely capable of causing a photoelectric effect when it strikes a sodium plate. Suppose the photon is instead absorbed by hydrogen. Find the minimum n for a hydrogen atom that can be ionized by such a photonarrow_forwardFor a hydrogen-like atom (the atom contains only one electron, like singly ionized He, doubly ionized Lithium, etc.), the energy levels are given by En = -Z2(13.6)/n2 eV where Z is the atomic number. If an electron in a doubly ionized Lithium atom jumps from the 2nd excited state to the ground state, what would be the wavelength of the emitted photon? A) 3.21 nm B) 3.21 pm C) 6.42 pm D) none of these.arrow_forwardUV radiation photons with a wavelength of 3.45 ? 10^−7 ? are incident on a metal surface in a vacuum. Photoelectric effect took place and electrons were instantaneously emitted from the surface with a maximum kinetic energy of 1.52 eV (electron-volt is another unit for energy, where 1 eV = 1.602 ? 10^−19?). What is the Work Function of the unknown metal?arrow_forward
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