Answered: In conventional television, signals are…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

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 obstacle’s
“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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