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# In conventional television, signals are broadcast from

ISBN: 9781118230718 79

## Solution for problem 4 Chapter 36

Fundamentals of Physics | 10th Edition

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Problem 4

In conventional television, signals are broadcast from towers to home receivers. Even when a receiver is not in direct view of a tower because of a hill or building, it can still intercept a signal if the signal diffracts enough around the obstacle, into the obstacles shadow region. Previously, television signals had a wavelength of about 50 cm, but digital television signals that are transmitted from towers have a wavelength of about 10 mm. (a) Did this change in wavelength increase or decrease the diffraction of the signals into the shadow regions of obstacles? Assume that a signal passes through an opening of 5.0 m width between two adjacent buildings. What is the angular spread of the central diffraction maximum (out to the first minima) for wavelengths of (b) 50 cm and (c) 10 mm?

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Week 2 Lecture 2 I. The Diegesis and the Plot/Story Distinction A. *Diegesis = the world of the film’s story, the world inhabited by the film’s characters i. Something diegetic (such as a characters) is part of the story world ii. Something non­diegetic (such as the musical score or the opening...

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