A star emits most of the energy it produces in the form of light waves. A spherical spacecraft of radius r = 50 m arrives to investigate the star. It is at a distance of 50 · 10^6 km from the stars center. The spaceship absorbs all the light that hits its surface. The power absorbed by the spacecraft from the star is 10^7 W (assume that the spaceship absorbs all the radiation that hits it). (a) Estimate the force that the EM radiation exerts on the spaceship. (b) What is the intensity (energy per area) of the star’s radiation at the location of the spacecraft? (c) What is the power output of the star? (d) Say that there is second spherical spacecraft a distance d = 10^8 km away, with a radius r = 10 m. If this spacecraft completely absorbs the radiation of the star, what is the power absorbed by the spaceship? [hint: The important area of the spaceship is its circular cross section]
A star emits most of the energy it produces in the form of light waves. A spherical spacecraft of radius r = 50 m arrives to investigate the star. It is at a distance of 50 · 10^6 km from the stars center. The spaceship absorbs all the light that hits its surface. The power absorbed by the spacecraft from the star is 10^7 W (assume that the spaceship absorbs all the radiation that hits it). (a) Estimate the force that the EM radiation exerts on the spaceship. (b) What is the intensity (energy per area) of the star’s radiation at the location of the spacecraft? (c) What is the power output of the star? (d) Say that there is second spherical spacecraft a distance d = 10^8 km away, with a radius r = 10 m. If this spacecraft completely absorbs the radiation of the star, what is the power absorbed by the spaceship? [hint: The important area of the spaceship is its circular cross section]
College Physics
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ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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A star emits most of the energy it produces in the form of light waves. A spherical spacecraft of radius r = 50 m arrives to investigate the star. It is at a distance of 50 · 10^6 km from the stars center. The spaceship absorbs all the light that hits its surface. The power absorbed by the spacecraft from the star is 10^7 W (assume that the spaceship absorbs all the radiation that hits it).
(a) Estimate the force that the EM radiation exerts on the spaceship.
(b) What is the intensity (energy per area) of the star’s radiation at the location of the spacecraft?
(c) What is the power output of the star?
(d) Say that there is second spherical spacecraft a distance d = 10^8 km away, with a radius r = 10 m. If this spacecraft completely absorbs the radiation of the star, what is the power absorbed by the spaceship? [hint: The important area of the spaceship is its circular cross section]
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VIEWStep 3: (b) The intensity of the star’s radiation at the location of the spacecraft:
VIEWStep 4: (c) The power output of the star:
VIEWStep 5: (d) Power absorbed when d and r is changed:
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