A small satellite is in orbit around the Earth at a height of 1000 km above the surface. It has a ass of 100 kg, a radius of 1 m, an absorptivity of 0.9 for IR radiation and 0.5 for visible adiation. ) What solid angle does the Earth subtend when viewed from the satellite? ) Calculate the radiative equilibrium temperature of the satellite when it is in the shadow of the arth. What is the radiative equilibrium temperature of the satellite at the moment when it passes ompletely out of the shadow of the Earth? (Note that at this time the Earth is still completely

A small satellite is in orbit around the Earth at a height of 1000 km above the surface. It has a ass of 100 kg, a radius of 1 m, an absorptivity of 0.9 for IR radiation and 0.5 for visible adiation. ) What solid angle does the Earth subtend when viewed from the satellite? ) Calculate the radiative equilibrium temperature of the satellite when it is in the shadow of the arth. What is the radiative equilibrium temperature of the satellite at the moment when it passes ompletely out of the shadow of the Earth? (Note that at this time the Earth is still completely

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter10: Atomic Physics

Section: Chapter Questions

Problem 1C

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A small satellite is in orbit around the Earth at a height of 1500 km above the surface. It has a mass of 100 kg, a diameter of 1 m, an absorptivity of 0.8 for IR radiation and 0.4 for visible radiation. a) What solid angle does the Earth subtend when viewed from the satellite? b) Calculate the radiative equilibrium temperature of the satellite when it is in the shadow of the Earth. c) What is the radiative equilibrium temperature of the satellite at the moment when it passes completely out of the shadow of the Earth? (Note that at this time the Earth is still completely dark when viewed from the satellite.)
An infrared satellite measures outgoing radiation that leaves Earth's surface through an atmospheric window. The observed spectral irradiance at a wavelength of 10 μm is 2.199×107 W m-2 m-1. What is the temperature of the surface? Give your answer in K.
5. Calculate the total power radiated per unit area by a tungsten filament at a temperature of 3000. K. (Assume that the filament is an ideal radiator.) (b) If the tungsten filament of a lightbulb is rated at 75.0 W, what is the surface area of the filament? (Assume that the main energy loss is due to radiation.)
2. The wavelength of maximum intensity of the sun's radiation is observed to be near 500 nm. Assume the sun to be a black-body and calculate,imsed of (a) the sun's surface temperature (b) the power per unit area (intensity) emitted from he sun's surface. (c) At what rate is the sun losing mass in units of kg/s? (Hint: What are the units from rignslavaw wert odrai Jari W (d) your answer in part (b)?) (d) At that rate, how much time would it take to exhaust the sun's fuel supply? Does your answer seem reasonable? (The sun's mass is ~2.0x1030 kg)
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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. 3a
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Describe why molecules produce peaks when they absorb infrared radiation. Give appropriate examples
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How many kilowatts will be radiated from a spherical black body 15 cm in diameter at a temperature of 800°C? Badly needed asap. I will rate helpful. Thank you in advance.
1. The maximum radiance of a blackbody is at wavelength λ = 1.2 µm. a) At what temperature does this occur? b) Estimate the brightness temperature for a grey body at this wavelength if the emissivity coefficient is 0.9. (Use the full formula.) ( hc