Physical Universe
16th Edition
ISBN: 9780077862619
Author: KRAUSKOPF, Konrad B. (konrad Bates), Beiser, Arthur
Publisher: Mcgraw-hill Education,
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Chapter 9, Problem 49E
To determine
In what way laser light is differ from light from other sources.
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A red laser with wavelength 633 nm emits 1.92kW of power. The number of photons emitted per second is:
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Chapter 9 Solutions
Physical Universe
Ch. 9 - Prob. 1MCCh. 9 - Prob. 2MCCh. 9 - Prob. 3MCCh. 9 - Prob. 4MCCh. 9 - Prob. 5MCCh. 9 - Prob. 6MCCh. 9 - Prob. 7MCCh. 9 - Prob. 8MCCh. 9 - Prob. 9MCCh. 9 - Prob. 10MC
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- How many photons are emitted during a 2.50-second burst of light from a 445 nm laser that operates at 0.400 watts?arrow_forwardA laser emits light at a wavelength of 678 nm. How many photons are required to emit 1 joule of energy?arrow_forwardDoes a laser material have to have at least three energy levels? If that is the case, why or why not?arrow_forward
- The light emitted from a laser is.. A) Multidirectional B Many wavelengths C) incoherent D coherent Which of the following is the emission that produced one photon? A) Spontaneous emission Stimulated emission Excitation process Absorption processarrow_forwardLight from a laser has a wavelength of 404 nm. What is the energy of the light in electron-volts (eV)?arrow_forwardA laser emits a pulse of light with wavelength 532 nm. If the total energy contained in the pulse is 1.2 J, the number of photons in the pulse is?arrow_forward
- A difference of 2.3 eV separates two energy levels in an atom. What is the frequency of radiation emitted when the atom make a transition from the upper level to the lower level?arrow_forwardwhat are some facts about the laser device (Light Amplification by Stimulated Emission of Radiation.)arrow_forwardHow many photons are emitted per second from a semiconductor laser which emits 0.75 mW of light at a wavelength of 540 nm? O 239E+15 O 2.04E+15 O 2.85E+15 O 3.21E+15arrow_forward
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