Foundations of Astronomy (MindTap Course List)
14th Edition
ISBN: 9781337399920
Author: Michael A. Seeds, Dana Backman
Publisher: Cengage Learning
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Chapter 7, Problem 4P
To determine
The temperature of the star’s surface.
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Chapter 7 Solutions
Foundations of Astronomy (MindTap Course List)
Ch. 7 - Prob. 1RQCh. 7 - Prob. 2RQCh. 7 - Prob. 3RQCh. 7 - Prob. 4RQCh. 7 - Prob. 5RQCh. 7 - Prob. 6RQCh. 7 - Prob. 7RQCh. 7 - Prob. 8RQCh. 7 - Prob. 9RQCh. 7 - Prob. 10RQ
Ch. 7 - Prob. 11RQCh. 7 - Prob. 12RQCh. 7 - Prob. 13RQCh. 7 - Prob. 14RQCh. 7 - Prob. 15RQCh. 7 - Prob. 16RQCh. 7 - How is heat different from temperature?Ch. 7 - Prob. 18RQCh. 7 - Prob. 19RQCh. 7 - Prob. 20RQCh. 7 - Prob. 21RQCh. 7 - Prob. 22RQCh. 7 - Could an object be orbiting another object and we...Ch. 7 - Prob. 24RQCh. 7 - How Do We Know? How is the macroscopic world you...Ch. 7 - Prob. 1PCh. 7 - Answer these questions for celestial bodies at...Ch. 7 - Prob. 3PCh. 7 - Prob. 4PCh. 7 - Prob. 5PCh. 7 - Prob. 6PCh. 7 - Prob. 7PCh. 7 - Prob. 8PCh. 7 - Prob. 9PCh. 7 - Prob. 10PCh. 7 - Prob. 11PCh. 7 - Prob. 12PCh. 7 - Prob. 1SOPCh. 7 - Prob. 2SOPCh. 7 - Prob. 1LTLCh. 7 - Prob. 2LTLCh. 7 - Prob. 3LTLCh. 7 - Prob. 4LTLCh. 7 - Prob. 5LTLCh. 7 - Prob. 6LTLCh. 7 - Prob. 7LTL
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- A blackbody's temperature may be estimated using the maximum intensity wavelength Amax of the light that it emits. A star may be modeled as a blackbody. Determine the surface temperature T of a star for which Amax = 661 nm. T = Karrow_forward5.3 The surface temperature of the Sun is 5800 K about and measurements of the Sun's spectral distribution show that it radiates very nearly like a blackbody, deviating mainly at very short wavelengths. Assuming that the Sun radiates like an ideal blackbody, at what wavelength does the peak of the solar spectrum occur?arrow_forwardA star such as our Sun will eventually evolve to a “red giant” star and then to a “whitedwarf” star. A typical white dwarf is approximately the size of Earth, and its surfacetemperature is about 2.5×103 K. A typical red giant has a surface temperature of 3.0×104K and a radius ~100,000 times larger than that of a white dwarf.a) What is the average radiated power per unit area by each of these types of stars?b) What is the ratio of total power radiated from the white dwarf over the power of thered giant? assume that both stars have emission e = 1arrow_forward
- The maximum intensity of radiation emitted by a star occurs at a surface temperature of 4.3 x 104 K. a) Calculate the wavelength of the emitted radiation when the intensity is maximum. b) Calculate the ratio of the intensity radiated at a wavelength of 60.0 nm to the maximum intensity. Assume that the star radiates like an ideal blackbody.arrow_forwardThe sun can be treated as a blackbody at an effective surface temperature of 10,400 R. Determine the rate at which infrared radiation energy (l = 0.762100 mm) is emitted by the sun, in Btu/h·ft2.arrow_forwardProxima Centauri, the nearest star to our Sun, has a surface temperature of 2,768.85 °C. What is its total intensity emitted? O 4.3 MW per square meter. O 4.9 MW per square meter. O 5.2 MW per square meter. O 5.7 MW per square meter. O 6.4 MW per square meter.arrow_forward
- The wavelength of maximum solar emission is observed to be approximately 0.475 μm. What is the surface temperature of the sun (assumed as blackbody)?arrow_forwardA star has a surface temperature of 6400 K. The intensity of a sunspot is found to be 1/3 the intensity of the surrounding surface. What is the temperature of this sunspot?arrow_forward2. Can we Estimate the Solar Constant? A result from theoretical physics, known as the Stefan-Boltzmann law, states that the total power radiated by a blackbody at temperature T (K) per unit surface area is given by E=GT* where E is radiated power per unit surface area of the blackbody and o is the Stefan-Boltzmann constant equal to 5.67 x 10* Wm?K*. Let's assume that the sun is a perfect blackbody at T= 5783 K and apply the laws of energy conservation to estimate the average incidence of solar energy [W/m] arriving at the top of Earth's atmosphere (we call that incident energy the solar constant). Compare your calculated estimate of the solar constant to that commonly used to model the sun. Assuming the following constants: d = 1.39e9 m=Diameter of the sun de = 1.27e7 m = Diameter of the earth Res = 1.49el1 m = Mean earth-to-sun distance (HINT: use this distance as the radius of a sphere centered on the sun).arrow_forward
- What is the maximum wavelength emitted by a blackbody whose temperature is 2900 Karrow_forwardThe surface temperature of a star is about 10,000 K. Use this to calculate the total energy radiated by the star per second. (You may use that the radius of the star is 2.5 times that of the Sun.)arrow_forwardA star has a power output of 2.5 x 1026 W and a radius of 8.92 x 10³ m. Calculate the surface temperature of the star.arrow_forward
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