Universe
11th Edition
ISBN: 9781319039448
Author: Robert Geller, Roger Freedman, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 5, Problem 46Q
To determine
The speed at which you were approaching the red signal of wavelength
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You have been hired as an expert witness for an attorney who is representing a speeding driver. The driver of the car was given a ticket for running a red light at an intersection. According to the driver, who has taken some courses in physics, when he was looking at the red light as he approached the intersection, the Doppler shift made the light of wavelength 650 nm appear to be green light of wavelength 520 nm. Therefore, according to the driver, he should not be charged with running a red light because it appeared green to him. What advice do you give the attorney?
Q1(A). Prove using step-by-step solution that f(v) = E/h is equal to 1.80x1015 Hz, therefore λ = C/f is equal to 254nm.
Q1(B). Refer to the visible light spectrum to determine what region of EM radiation does this light fall?
Q1(C). Show step-by step solution to integrate the velocity function if the initial position of the particle is s(0) = 9. Find the particle position at: (1) t = 1 sec ; (2) t = 5 sec
Electrons are ejected from a metallic surface with speeds ranging up to 4.1 × 105
m/s when light with a wavelength of 630nm is used. What is the cutoff frequency for
this surface? Express your answer in terms of 1014 Hz and round it to the nearest
hundredth. For example, if you get 1.234 x 1014 Hz, you type in 1.23. (Hint: you
should first calculate the work function of the surface.)
Use h=6.626x1034 Js; c=3 x108 m/s. ; me=9.11x10-31kg
Js; c=3 x108 m/s. ; me=9.11x1031kg
Chapter 5 Solutions
Universe
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