11th Edition

ISBN: 9780134159386

Author: Dale Ewen, Neill Schurter, Erik Gundersen

Publisher: PEARSON

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Textbook Question

Chapter 20.5, Problem 15P

If an observer triples her distance from a light source: (a) Does the illumination at that point increase or decrease? (b) In what proportion does the illumination increase or decrease?

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Chapter 20.5, Problem 14P

Chapter 20.5, Problem 16P

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Chapter 20 Solutions

Applied Physics (11th Edition)

Ch. 20.2 - Find the distance (in metres) traveled by a radio...Ch. 20.2 - Prob. 2P Ch. 20.2 - A television signal is sent to a communications...Ch. 20.2 - How long does it take for a radio signal from the...Ch. 20.2 - The sun is 9.30107mi from the earth. How long does...Ch. 20.2 - A radar wave is bounced off an airplane and...Ch. 20.2 - How long does it take for a radio wave to travel...Ch. 20.2 - How long does it take for a flash of light to...Ch. 20.2 - How long does it take for a police radar beam to...Ch. 20.2 - How far away (in km) is an airplane if the radar...

Ch. 20.2 - An auto mechanic uses a strobe light to time a...Ch. 20.2 - A construction company uses GPS technology to...Ch. 20.2 - (a) How long does it take for light to reach the...Ch. 20.2 - Prob. 14P Ch. 20.2 - How long does it take light to reach the earth...Ch. 20.2 - Preparing for reentry, astronauts use radar to...Ch. 20.2 - Prob. 17P Ch. 20.2 - Light from the sun travels 1.50108 km to reach the...Ch. 20.3 - c=3.00108m/s =4.55105m f=?Ch. 20.3 - c=3.00108m/s =9.701010m f=?Ch. 20.3 - c=3.00108m/s f=9.701011Hz =?Ch. 20.3 - c=3.00108m/s f=24.2 MHz =?Ch. 20.3 - c=3.00108m/s f=45.6 MHz =?Ch. 20.3 - Prob. 6P Ch. 20.3 - Prob. 7P Ch. 20.3 - Prob. 8P Ch. 20.3 - Find the wavelength of a radio wave from an AM...Ch. 20.3 - Find the wavelength of a radio wave from an FM...Ch. 20.3 - Find the frequency of an electromagnetic wave if...Ch. 20.3 - Find the frequency of an electromagnetic wave if...Ch. 20.3 - Prob. 13P Ch. 20.3 - Prob. 14P Ch. 20.3 - Prob. 15P Ch. 20.3 - An AM radio station broadcasts a signal with a...Ch. 20.4 - Prob. 1P Ch. 20.4 - Prob. 2P Ch. 20.4 - Prob. 3P Ch. 20.4 - Find the frequency of electromagnetic radiation...Ch. 20.4 - Find the frequency of electromagnetic radiation...Ch. 20.4 - Prob. 6P Ch. 20.4 - Find the frequency of electromagnetic radiation...Ch. 20.4 - Prob. 8P Ch. 20.4 - Prob. 9P Ch. 20.4 - Prob. 10P Ch. 20.4 - Prob. 11P Ch. 20.4 - Prob. 12P Ch. 20.4 - An AM radio station in a nearby town broadcasts a...Ch. 20.5 - I=48.0 cd I=___m Ch. 20.5 - Prob. 2P Ch. 20.5 - I=765 m I=___ cd Ch. 20.5 - I=432 m I=___ cd Ch. 20.5 - I=75.0 cd I=___ m Ch. 20.5 - I=650 m I=___ cd Ch. 20.5 - I=900 m r=7.00 ft E=?Ch. 20.5 - I=741 m r=6.50 m E=?Ch. 20.5 - I=893 m r=3.25 ft E=?Ch. 20.5 - E=4.32 lux r=9.00 m I=?Ch. 20.5 - E=10.5 ft-candles r=6.00 ft I=?Ch. 20.5 - Prob. 12P Ch. 20.5 - Prob. 13P Ch. 20.5 - Prob. 14P Ch. 20.5 - If an observer triples her distance from a light...Ch. 20.5 - If the illuminated surface is slanted at an angle...Ch. 20.5 - Find the illumination on a surface by three light...Ch. 20.5 - Find the intensity of two identical light sources...Ch. 20.5 - Find the intensity of two identical light sources...Ch. 20.5 - A desk is 3.35 m below an 1850-m incandescent...Ch. 20 - Which of the following are examples of...Ch. 20 - Prob. 2RQ Ch. 20 - Prob. 3RQ Ch. 20 - Light behaves a. as a massive particle. b. always...Ch. 20 - Does the wavelength of light depend on its...Ch. 20 - Prob. 6RQ Ch. 20 - How does the intensity of illumination depend on...Ch. 20 - In your own words, explain how the speed of light...Ch. 20 - Does light always travel at the same speed?...Ch. 20 - What name is given to the entire range of waves...Ch. 20 - Prob. 11RQ Ch. 20 - Who developed the wave packet theory of light?Ch. 20 - Who made the first estimate of the speed of light?Ch. 20 - How was the first estimate of the speed of light...Ch. 20 - What are the units of luminous intensity?Ch. 20 - In your own words, explain luminous intensity.Ch. 20 - Find the distance (in metres) traveled by a radio...Ch. 20 - A radar wave that is bounced off an airplane...Ch. 20 - How long does it take for a police radar beam to...Ch. 20 - Prob. 4RP Ch. 20 - How long does it take for a radio signal to travel...Ch. 20 - Find the wavelength of a radio wave from an AM...Ch. 20 - Find the frequency of a radio wave if its...Ch. 20 - Prob. 8RP Ch. 20 - Prob. 9RP Ch. 20 - Prob. 10RP Ch. 20 - Prob. 11RP Ch. 20 - Prob. 12RP Ch. 20 - Prob. 13RP Ch. 20 - Find the intensity of the light source necessary...Ch. 20 - Prob. 15RP Ch. 20 - Find the intensity of two identical light sources...Ch. 20 - Find the illumination on a surface by three light...Ch. 20 - Prob. 1AC Ch. 20 - (a) When the Apollo astronauts landed on the moon,...Ch. 20 - Prob. 3AC Ch. 20 - The individual rods on rooftop antennas are...Ch. 20 - Prob. 5AC

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