COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 26, Problem 45QAP
To determine
The wavelength of maximum
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Problem-1:
An asteroid is hurtling toward earth at 150,000“. The temperature of the asteroid is about 100 K, meaning that its peak emission
is 2 = 29 µm. The speed of light is c =
3E[8].
a) What is the wavelength of light that we receive from the asteroid? (Answer: 2.89855E[-05] m)
Question A7
The intensity of the emitted radiation by a star is at a maximum at a wavelength of 78.9 nm.
a) Calculate the surface temperature of the star.
b) Calculate the ratio of the intensity radiated at 65.0 nm to the maximum intensity.
Assume that the star radiates like an ideal blackbody.
Consider the following.
(a) Model the tungsten filament of a lightbulb as a blackbody at temperature 3320 K. Determine the wavelength of light it emits most strongly.
Your response differs from the correct answer by more than 10%. Double check your calculations. nm
Chapter 26 Solutions
COLLEGE PHYSICS
Ch. 26 - Prob. 1QAPCh. 26 - Prob. 2QAPCh. 26 - Prob. 3QAPCh. 26 - Prob. 4QAPCh. 26 - Prob. 5QAPCh. 26 - Prob. 6QAPCh. 26 - Prob. 7QAPCh. 26 - Prob. 8QAPCh. 26 - Prob. 9QAPCh. 26 - Prob. 10QAP
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- A cavity radiator has its maximum spectral radiance at a wavelength of 6,9×10 m. If the body is heated so that T/To = 9,4, what will be the ratio of radiant powers W/Wo? Wien's constant b = 2.897 x103 m-K. 3aarrow_forwardThe wavelength at which the Sun emits its most intense light is about 550 nm. (The Sun's data can be found on the inside back cover of the book; use Stefan's Law to calculate the power.) a) Assuming the Sun radiates as a perfect blackbody, estimate its surface temperature. b) Assuming the Sun radiates as a perfect blackbody, estimate its total emitted power.arrow_forwardAnswer the following. (a) What is the surface temperature of Betelgeuse, a red giant star in the constellation of Orion, which radiates with a peak wavelength of about 970 nm? K(b) Rigel, a bluish-white star in Orion, radiates with a peak wavelength of 145 nm. Find the temperature of Rigel's surface. Karrow_forward
- What is the surface temperature of Betelgeuse, a red giant star in the constellation of Orion, which radiates with a peak wavelength of about 970 nm? (b) Rigel, a bluish - white star in Orion, radiates with a peak wavelength of 145 nm. Find the temperature of Rigel’s surface.arrow_forwardAnswer the following. (a) What is the surface temperature of Betelgeuse, a red giant star in the constellation of Orion, which radiates with a peak wavelength of about 970 nm? K (b) Rigel, a bluish-white star in Orion, radiates with a peak wavelength of 145 nm. Find the temperature of Rigel's surface. Karrow_forwardEstimate the total energy loss by radiation if a person’s head is uncovered for 13.3 min on a very cold, −15.0°C day, assuming he is bald, his skin temperature is 35.0°C, and that skin has an emissivity (in the infrared) of 97.0%. Assume that the man’s head is spherical, with a radius of 10.0 cm. The Stefan–Boltzmann constant is 5.670 × 10−8 W/ (m2·K4).arrow_forward
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