At a certain time of the year, the thermal radiation from the sun (radius of 6.955x10^8...
At a certain time of the year, the thermal radiation from the sun (radius of 6.955x10^8 m) has an intensity of 1.23x10^3 W/m^2 when it reaches the Earth. The surface temperature of the Sun is 5778K and its emissivity is 1.00.
i. Calculate the rate energy transfer from the surface of the Sun. Express your answer in W.
ii. Use the above information to estimate the distance from the earth to the sun, in meters.
Homework Answers
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At a certain time of the year, the thermal radiation from the
sun (radius of 6.955x10^8...
At our distance from the Sun, the intensity of solar radiation is 1370 W/m^2 . As...
At our distance from the Sun, the intensity of solar radiation is 1370 W/m^2 . As discussed in class and in the textbook, the temperature of the Earth is affected by the greenhouse effect of the atmosphere. This phenomenon describes the effect of absorption of infrared radiation by the surface so as to make the surface temperature of the Earth higher than if it were airless. The average global surface temperature of the Earth is ~288 K. Calculate the surface...
At our distance from the Sun, the intensity of solar radiation is 1370 W/m2. The temperature...
At our distance from the Sun, the intensity of solar radiation is 1370 W/m2. The temperature of the Earth is affected by the greenhouse effect of the atmosphere. This phenomenon describes the ef- fect of absorption of infrared light emitted by the surface so as to make the surface temperature of the Earth higher than if it were airless. For comparison, consider a spherical object of radius r with no atmosphere at the same distance from the Sun as the...
A python can detect thermal radiation from objects that differ in temperature from their environment as...
A python can detect thermal radiation from objects that differ in temperature from their environment as long as the received intensity of thermal radiation is greater than 0.60 W/m2. Your body emits a good deal of thermal radiation; a typical human body has a surface area of 1.8 m2, a surface temperature of 30∘C, and an emissivity e = 0.97 at infrared wavelengths. As we've seen, the intensity of a source of radiation decreases with the distance from the source.If...
The intensity of radiation reaching the earth from the sun is 1350 W/m2. The earth's radius...
The intensity of radiation reaching the earth from the sun is 1350 W/m2. The earth's radius is 6.4 ´ 106 m. How big a force does this radiation exert on the earth? (Assume it is all absorbed.)
Problem 4: Radiation from the Sun The intensity of the radiation from the Sun is 1360...
Problem 4: Radiation from the Sun The intensity of the radiation from the Sun is 1360 W/m2 and frequency is f60 MHz. The distance between the Earth and the Sun is 1.5 x 1011m a) Assuming it radiates uniformly in all directions what is the total power output of the Sun? b) If the frequency increases by 1 MHz what would be the relative change in the power output?
A python can detect thermal radiation with intensity greater than 0.60 W/m2. A typical human body...
A python can detect thermal radiation with intensity greater than 0.60 W/m2. A typical human body has a surface area of 1.8 m2, a surface temperature of 30∘C, and an emissivity e = 0.97 at infrared wavelengths. What is the maximum distance from which a python can detect your presence? You can model the human body as a point source of radiation.
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...
Using Stefan-Boltzmann and Wien laws, estimate how many Watts a cow emits in thermal radiation and...
Using Stefan-Boltzmann and Wien laws, estimate how many Watts a cow emits in thermal radiation and at what ‘color’ (wavelength) most of it is. Think the cow as a sphere (good approximation J) of 1.5 meters radius and 310 K temperature and do the calculation by comparing the cow to the Sun (…). The Sun emits P = 4 1026Watts, its radius is 6.95 10 ^89m and its surface temperature T(Sun) = 5,800 K.
Electromagnetic Wave Questions 2. Our sun has a power output of roughly 3.87 1026 watts (W)....
Electromagnetic Wave Questions
2. Our sun has a power output of roughly 3.87 1026 watts (W). This energy is transmitted essentially uniformly in all directions. By the time this radiation reaches the Earth, which has an average distance from the sun of 1.50 x 10" m, what is the intensity? (Recall that intensity is defined to be power per unit area). 3. The energy from the sun is primarily in the infrared and visual wavelengths. The following table gives the...
need help with part b Problem 4: Radiation from the Sun The intensity of the radiation...
need help with part b
Problem 4: Radiation from the Sun The intensity of the radiation from the Sun is 1360 W/m2 and frequency is f = 60MHz The distance between the Earth and the Sun is 1.5 x 10 เร็3.1. a) Assuming it radiates uniformly in all directions what is the total power output of the Sun? b) If the frequency increases by 1 MHz what would be the relative change in the power output?
At our distance from the Sun, the intensity of solar radiation is 1370 W/m2. The temperature of the Earth is affected by the greenhouse effect of the atmosphere. This phenomenon describes the ef- fect of absorption of infrared light emitted by the surface so as to make the surface temperature of the Earth higher than if it were airless. For comparison, consider a spherical object of radius r with no atmosphere at the same distance from the Sun as the...
Problem 4: Radiation from the Sun The intensity of the radiation from the Sun is 1360 W/m2 and frequency is f60 MHz. The distance between the Earth and the Sun is 1.5 x 1011m a) Assuming it radiates uniformly in all directions what is the total power output of the Sun? b) If the frequency increases by 1 MHz what would be the relative change in the power output?
Electromagnetic Wave Questions
2. Our sun has a power output of roughly 3.87 1026 watts (W). This energy is transmitted essentially uniformly in all directions. By the time this radiation reaches the Earth, which has an average distance from the sun of 1.50 x 10" m, what is the intensity? (Recall that intensity is defined to be power per unit area). 3. The energy from the sun is primarily in the infrared and visual wavelengths. The following table gives the...
need help with part b
Problem 4: Radiation from the Sun The intensity of the radiation from the Sun is 1360 W/m2 and frequency is f = 60MHz The distance between the Earth and the Sun is 1.5 x 10 เร็3.1. a) Assuming it radiates uniformly in all directions what is the total power output of the Sun? b) If the frequency increases by 1 MHz what would be the relative change in the power output?
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