Astronomy Today (9th Edition)
9th Edition
ISBN: 9780134450278
Author: Eric Chaisson, Steve McMillan
Publisher: PEARSON
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Question
Chapter 3, Problem 8MC
To determine
The correct option, from the following options, for the effect on the energy emission of the Sun if its temperature were to double, using Stefan's law.
(a) decrease by half of its present value
(b) double
(c) increase by four times
(d) increase by 16 times
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Students have asked these similar questions
Given the Sun's present rate of energy generation (i.e. its present luminosity), how long will the Sun's energy source last (from beginning to end)? Answer in years.
Whether the statements that the temperature of the Sun is about
15 million °C or the temperature of the Sun is 15 million Kelvin have
discrepancy
or not.
Let's examine how we know that the Sun cannot power itself by chemical reactions. Using the fact that an average chemical reaction between two atoms releases 1.6×10-19 J of energy, estimate how long the Sun could emit energy at its current luminosity. Compare that estimate to the known age of Earth.
Chapter 3 Solutions
Astronomy Today (9th Edition)
Ch. 3 - Prob. 1DCh. 3 - Prob. 2DCh. 3 - Prob. 3DCh. 3 - Prob. 4DCh. 3 - Prob. 5DCh. 3 - Prob. 6DCh. 3 - Prob. 7DCh. 3 - Prob. 8DCh. 3 - Prob. 9DCh. 3 - Prob. 10D
Ch. 3 - Prob. 11DCh. 3 - Prob. 12DCh. 3 - Prob. 13DCh. 3 - Prob. 14DCh. 3 - Prob. 15DCh. 3 - Prob. 1MCCh. 3 - Prob. 2MCCh. 3 - Prob. 3MCCh. 3 - Prob. 4MCCh. 3 - Prob. 5MCCh. 3 - Prob. 6MCCh. 3 - Prob. 7MCCh. 3 - Prob. 8MCCh. 3 - Prob. 9MCCh. 3 - Prob. 10MCCh. 3 - Prob. 1PCh. 3 - Prob. 2PCh. 3 - Prob. 3PCh. 3 - Prob. 4PCh. 3 - Prob. 5PCh. 3 - Prob. 6PCh. 3 - Prob. 7PCh. 3 - Prob. 8P
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- Now suppose that all of the hydrogen atoms in the Sun were converted into helium. How much total energy would be produced? (To calculate the answer, you will have to estimate how many hydrogen atoms are in the Sun. This will give you good practice with scientific notation, since the numbers involved are very large! See Appendix C for a review of scientific notation.)arrow_forwardSuppose the Sun were to shrink to 50% of its present diameter. How would the gravitational energy released during that contraction compare with the gravitational energy released during the Sun's contraction to its present diameter?arrow_forwardFrom which atmospheric layer of the Sun did the photons originate that resulted in sunburn? How do you know?arrow_forward
- (Astronomy) Light thermally emitted from the surface of a typical neutron star indicates that it has a temperature of 1,800,000 K. This temperature is about 300 times the temperature of the photosphere of the sun. This means that each square meter of the surface emits _______ more energy per second in thermal radiation than the photosphere of the sun.arrow_forwardWhat changes would you notice if the sun emitted radiation at an effective temperature of 2000 K instead of 5762 K.arrow_forwardWhat produced the helium now present in the sun's atmosphere?arrow_forward
- The diameters of the circles that make up the solar images in Dean's photo are about 1/100 the distance to the openings in the leaves that cast the spots. That means 100 circles placed end to end would extend from each spot to the opening that casts the spot. How does this tell you how many Suns would fit between the tree and the Sun's 150,000,000-kilometer distance from Earth?arrow_forwardwhy does nuclear fusion in the sun only occur near the center?arrow_forwardAppendix I lists some of the nearest stars. Are most of these stars hotter or cooler than the Sun? Do any of them emit more energy than the Sun? If so, which ones?arrow_forward
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