COLLEGE PHYSICS,V.2
COLLEGE PHYSICS,V.2
11th Edition
ISBN: 9781305965522
Author: SERWAY
Publisher: CENGAGE L
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Chapter 27, Problem 10CQ
To determine

The effect of temperature on the ease with which electrons can be ejected from the material via the photoelectric effect.

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A) Astronomers measure the peak wavelength of a nearby star to be 410 nm. What is the star's temperature? B) How much energy does a single photon of light have at this wavelength? C) An electron bound in an unknown metal requires 1.45E-19 ] of energy under the photoelectric effect to become free of the metal. How much kinetic energy would it have if struck by the photon froft part (b)? D) What is the final speed of the elctron from part (c)?
Give an answer to the following question: In the photoelectric effect, how can a photon moving in one direction eject an electron moving in a different direction? What happens to conservation of momentum?
When a beam of 10.6 eV photons of intensity 2.0 W/m² falls on a platinum surface of area 1.0 x104 m² and work function 5.6 eV, 0.53% of the incident photons eject photo electrons. Find the number of photoelectrons emitted per second and their minimum and maximum energies (in eV). J. Take 1 eV =1.6 x 10-19
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