The surface temperature of the sun is about 5800 K. The radii of the earth and...
The surface temperature of the sun is about 5800 K. The radii of the earth and the sun are 6.40x106 m and 6.95x108 m, respectively. The earth is 1.49x1011 m from the sun. Calculate the blackbody temperature of the earth assuming the earth is in steady state with the power absorbed versus power emitted.
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The surface temperature of the sun is about 5800 K. The radii of
the earth and...
Calculate the average power that the surface of Earth facing the Sun receives from the Sun....
Calculate the average power that the surface of Earth facing the Sun receives from the Sun. Assuming that the Earth is a blackbody and radiates the same amount of power that it absorbs from the Sun, calculate the average surface temperature of the Earth. Does your answer make sense compared to your experience? The Sun’s surface temperature is 5800 K, its radius is 6.96x108 m, the distance between Earth and the Sun is 1.5x1011 m, and the radius of the...
The surface of the sun has a temperature of approximately 5800 K. To good approximation we...
The surface of the sun has a temperature of approximately 5800 K. To good approximation we can treat it as a blackbody. (a) What is the peak-intensity wavelength λm? (b) What is the total radiated power per unit area? (c) Find the power per unit area radiated from the surface of the sun in the wavelength range 600.0 to 605.0 nm.
The Sun's surface is a blackbody with a surface temperature of 5800 K. a) at what...
The Sun's surface is a blackbody with a surface temperature of 5800 K. a) at what wavelength does the sun emit most strongly? b) what is the total radiated power per unit surface area? c) what is the total radiated power over the entire surface?
Q1: The sun can be treated as a blackbody at an effective surface temperature of 10,400 R. The su...
Q1: The sun can be treated as a blackbody at an effective surface temperature of 10,400 R. The sun can be treated as a blackbody. (a) Determine the rate at which infrared radiation energy (0.76-100 um) is emitted by the sun, in Btu/hft. (b) Determine the fraction of the radiant energy emitted by the sun that falls in the visible range. (c) Determine the wavelength at which the emission of radiation from the sun peaks (d) Calculate and plot the...
Consider potential radiative energy balance at the surface of the Earth, with the Sun directly overhead...
Consider potential radiative energy balance at the surface of the Earth, with the Sun directly overhead in the sky. Assume that the incident solar radiative flux is reduced passing through the atmosphere to 0.85 times the TOA value, and that 20% of this is reflected at the ground. Calculate the temperature that the surface (radiating as a blackbody) would need to be at in order to be in instantaneous radiative energy balance with the solar radiation. What would you say...
The surface of the Sun has a temperature of 5500 ∘C. Treat the sun as a...
The surface of the Sun has a temperature of 5500 ∘C. Treat the sun as a perfect blackbody with an emissivity of 1.0 and a radius of 7.0*10^8 m. Given; the temperature of space is 3.0K and the power that it takes for the sun to radiate into space is 3.9 * 10^26 W. The solar constant is the number of watts of sunlight power falling on a square meter of the Earth's upper atmosphere. Calculate the solar constant given...
Construct plots that show the wavelength-dependent energy spectrum of a blackbody at a temperature of 5800...
Construct plots that show the wavelength-dependent energy spectrum of a blackbody at a temperature of 5800 K (approx. temperature of the Sun) using both the Planck distribution and the Raleigh-Jeans distribution. Confirm agreement between the two at long wavelength. a. What is the maximum emission wavelength at this temperature? b. What is the total power output (W/m^2) ? c. Using the Planck distribution, estimate what fraction of the Sun's total power output is emitted in visible wavelengths (400-750 nm)
1. The "surface" of the Sun is not sharp boundaries like the surface of the Earth....
1. The "surface" of the Sun is not sharp boundaries like the surface of the Earth. Most of the radiation that the Sun emits is in thermal equilibrium with the hot gases that make up the Sun's outer layers. Without too much error, we can treat sunlight as blackbody radiation. The total power radiated by the Sun is 3.87×1026W. Given the radius of the Sun is 6.96×108m, what is the surface temperature of the Sun? Suppose the temperature of the...
80. The sun is a sphere with a radius of 6.96 X 10a m and an...
80. The sun is a sphere with a radius of 6.96 X 10a m and an av- erage surface temperature of 5800 K. Determine the amount by which the sun's thermal radiation increases the entropy of the entire universe each second. Assume that the sun is a perfect blackbody, and that the average temperature of the rest of the universe is 2.73 K. Do not con- sider the thermal radiation absorbed by the sun from the rest of the universe.
The Sun shines with a blackbody temperature of 5780 K and a total power output of 3.8 x 1026 w. The Sun has been doing this for 4.5 x 10 yr, during which time the surface temperature has increased by...
The Sun shines with a blackbody temperature of 5780 K and a total power output of 3.8 x 1026 w. The Sun has been doing this for 4.5 x 10 yr, during which time the surface temperature has increased by a few percent and the luminosity by 20%, ie. they have remained roughly constant. (a) (5 marks) Use the heat-flow formula for entropy change to calculate the total entropy in all the sunlight the Sun has ever emitted. (b) (3...
Q1: The sun can be treated as a blackbody at an effective surface temperature of 10,400 R. The sun can be treated as a blackbody. (a) Determine the rate at which infrared radiation energy (0.76-100 um) is emitted by the sun, in Btu/hft. (b) Determine the fraction of the radiant energy emitted by the sun that falls in the visible range. (c) Determine the wavelength at which the emission of radiation from the sun peaks (d) Calculate and plot the...
Construct plots that show the wavelength-dependent energy spectrum of a blackbody at a temperature of 5800 K (approx. temperature of the Sun) using both the Planck distribution and the Raleigh-Jeans distribution. Confirm agreement between the two at long wavelength. a. What is the maximum emission wavelength at this temperature? b. What is the total power output (W/m^2) ? c. Using the Planck distribution, estimate what fraction of the Sun's total power output is emitted in visible wavelengths (400-750 nm)
80. The sun is a sphere with a radius of 6.96 X 10a m and an av- erage surface temperature of 5800 K. Determine the amount by which the sun's thermal radiation increases the entropy of the entire universe each second. Assume that the sun is a perfect blackbody, and that the average temperature of the rest of the universe is 2.73 K. Do not con- sider the thermal radiation absorbed by the sun from the rest of the universe.
The Sun shines with a blackbody temperature of 5780 K and a total power output of 3.8 x 1026 w. The Sun has been doing this for 4.5 x 10 yr, during which time the surface temperature has increased by a few percent and the luminosity by 20%, ie. they have remained roughly constant. (a) (5 marks) Use the heat-flow formula for entropy change to calculate the total entropy in all the sunlight the Sun has ever emitted. (b) (3...
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