COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 26, Problem 21QAP
To determine
The photon which have more energy
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57. The retina of a human eye can detect light when radiant energy incident on it is at least 4.00×10−17 J. For light of 595−nm wavelength, how many photons does this energy correspond to?
Does photon behave as both a particle and a wave? Explain.
Why do shadows look blue on a snowy day?
a. They are filled in by light from the blue sky.
b. They are filled in by blue photons that have been scattered over and over.
c. Short-wavelength photons are scattered by atmospheric particles.
d. all of these
Chapter 26 Solutions
COLLEGE PHYSICS
Ch. 26 - Prob. 1QAPCh. 26 - Prob. 2QAPCh. 26 - Prob. 3QAPCh. 26 - Prob. 4QAPCh. 26 - Prob. 5QAPCh. 26 - Prob. 6QAPCh. 26 - Prob. 7QAPCh. 26 - Prob. 8QAPCh. 26 - Prob. 9QAPCh. 26 - Prob. 10QAP
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- (a) If the power output of a 650-kHz radio station is 50.0 kW, how many photons per second are produced? (b) If the radio waves are broadcast uniformly in all directions, find the number of photons per second per square meter at a distance of 100 km. Assume no reflection from the ground or absorption by the air.arrow_forwardAn x ray tube has an applied voltage of 100 kV. (a) What is the most energetic x-ray photon it can produce? Express your answer in electron volts and joules. (b) Find the wavelength of such an X—ray.arrow_forwardWhich type of radiation is most suitable for the observation of diffraction patterns on crystalline solids; radio waves, visible light, or X-rays? Explain.arrow_forward
- (a) What is the shortest-wavelength x-ray radiation that can be generated in an x-ray tube with an applied voltage of 50.0 kV? (b) Calculate the photon energy in eV. (c) Explain the relationship of the photon energy to the applied voltage.arrow_forwardWhich aspects of the photoelectric effect cannot be explained without photons? Which can be explained without photons? Are the latter inconsistent with the existence of photons?arrow_forwardConfirm the statement in the text that the range of photon energies for visible light is 1.63 to 3.26 eV, given that the range of visible wavelengths is 380 to 760 nm.arrow_forward
- Consider the energy and speed of three different photons all traveling in a vacuum: one is red, one is green, and one is blue. a. The red photon will have the greatest energy and will also have the greatest speed. b. The blue photon will have the greatest energy and will also have the greatest speed. c. The red photon will have the greatest energy and all three photons will have the same speed. d. The blue photon will have the greatest energy and all three photons will have the same speed. e. All three photons will have the same energy and the same speed.arrow_forwardMY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) If the power output of a 670 kHz radio station is 49.0 kW, how many photons per second are produced? photons/s (b) If the radio waves are broadcast uniformly in all directions, find the number of photons per second per square meter at a distance of 125 km. Assume no reflection from the ground or absorption by the air. photons/(s · m²) Additional Materialsarrow_forward9. Rank the following electromagnetic radiations (blue light, red light, X-rays, and radio waves) according to the energies of their photons, from least to greatest. a. radio waves, red light, blue light, X-rays. b. radio waves, blue light, red light, X-rays. c. X-rays, red light, blue light, radio waves. d. X-rays, blue light, red light, radio waves. e. All four of these forms of light will have photons with the same energy.arrow_forward
- A photon of light has a frequency of 5.00 x 1014 Hz. If the frequency of the photon was doubled then which of these would happen to the energy of this photon? a. it would double b. it would triple c. it would quadruple d. it would become one-fourth as much e. it would become half as mucharrow_forwardI Review | Constants Periodic Table he human eye can barely detect a star whose intensity at the earth's urface is 1.6 x 10-11 W/m? Part A If the dark adapted eye has a pupil diameter of 6.0 mm , how many photons per second enter the eye from the star? Assume the starlight has a wavelength of 550 nm ? X•10" N = Submit Previous Answers Request Answerarrow_forwardWhich statement is TRUE about Einstein’s explanation regarding the photoelectric effect? I. The effect is not observed below a certain cut-off frequency since the photon energy must be greater than or equal to the work function.II. The maximum KE depends only on the frequency and the work function.III. The maximum KE depends only on the frequency, work function and intensity of light.IV. The maximum KE increases with increasing frequency. a) I, II and IV b) I and III c) I, II and III d) I and IIarrow_forward
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