Horizons: Exploring the Universe (MindTap Course List)
14th Edition
ISBN: 9781305960961
Author: Michael A. Seeds, Dana Backman
Publisher: Cengage Learning
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Chapter 6, Problem 2P
To determine
The wavelength at which star surface
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What is the rate of thermal radiation Emitted from a star with a radius of 2.310 x 10⁹m and a surface temperature of 8,420k? Assume that the spherical surface behaves as blackbody radiator .
At what wavelength would a star radiate the greatest amount of energy if the star has a surface temperature of 60,000 K?
a.
50 nm
b.
500 nm
c.
300 nm
d.
1.8 × 1011 nm
e.
180 nm
A star is moving toward Earth with a radial velocity (speed directly toward or away from Earth) of 40,000 km/s. If we take a spectrum of this star’s light, will we find it to be red shifted or blue shifted? By what fraction are the wavelengths in this star’s spectrum shifted? [Answer: λ0/λ = 0.88]
Chapter 6 Solutions
Horizons: Exploring the Universe (MindTap Course List)
Ch. 6 - Prob. 1RQCh. 6 - Prob. 2RQCh. 6 - Prob. 3RQCh. 6 - Prob. 4RQCh. 6 - Prob. 5RQCh. 6 - Prob. 6RQCh. 6 - Prob. 7RQCh. 6 - Prob. 8RQCh. 6 - Prob. 9RQCh. 6 - Prob. 10RQ
Ch. 6 - Prob. 11RQCh. 6 - How Do We Know? How is the world you see around...Ch. 6 - Prob. 1DQCh. 6 - Prob. 2DQCh. 6 - Prob. 1PCh. 6 - Prob. 2PCh. 6 - Prob. 3PCh. 6 - Prob. 4PCh. 6 - If one star has a temperature of 6000 K and...Ch. 6 - Prob. 6PCh. 6 - Prob. 7PCh. 6 - Prob. 8PCh. 6 - Prob. 1LTLCh. 6 - Prob. 2LTLCh. 6 - Prob. 3LTLCh. 6 - Prob. 4LTL
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- Which surface has a higher temperature — the surface of a yellow star or that of a red star?arrow_forwardIf one star has a temperature of 5,000 K and another star has a temperature of 8,500 , how much more energy per second will the hotter star radiate from each square meter of its surface? (asks for the difference, not ratio)arrow_forwardWhat is the temperature of a star emitting light with a peak wavelength of 7,080 angstroms? T= ____ X 10 ___ karrow_forward
- A distant star has a peak wavelength of 0.00000077. What is the temperature of that star?arrow_forwardThe surface temperature of a class O blue-white star is around 40 *10^3 K. At what frequency will it radiate most of its energy?arrow_forwardThe luminosity of a star is 6.6 x 1031 W and the peak wavelength in its spectrum is 4.6 x 10-7 m. Calculate the surface area of that star. Round off the answer to 2 decimal places with scientific representation.arrow_forward
- What is the luminosity of a star having three times the radius of the Sun and a surface temperature of 10,000 K?arrow_forwardIf a star gives off light at a peak wavelength of 6.80x10-7 m. What would be the temperature of this star in Kelvin?arrow_forwardA star that is moving toward Earth will a. have its spectral lines shifted to the red. b. have its spectral lines shifted to the blue. c. appear hotter than it actually is. d. appear cooler than it actually is. e. appear dimmer than it actually is.arrow_forward
- What is the luminosity of a star having four times the radius of the Sun and a surface temperature of 8,000 K?arrow_forwardA group of four stars, all the same size, have the four different surface temperatures given below. Which of these stars emits the most red light?A. 3000 K B. 4000 K C. 5000 K D. 6000 Karrow_forwardBy what fraction are the wavelengths in this star's spectrum shifted?arrow_forward
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