The sun has a power output of 3.83 × 1026 W. Installed on your roof is...
The sun has a power output of 3.83 × 1026 W. Installed on your roof is a solar panel that has a surface area of 1.40 m2 . How many photons from the Sun reach the panel? Assume that the average value of the wavelength of light is 580 nm. Assume also that the sun emits photons equally in all directions and that photons are not scattered or absorbed by atmosphere on their way to the panel. Use the average Earth-Sun distance.
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The sun has a power output of 3.83 × 1026 W. Installed on your
roof is...
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...
A satellite in Earth orbit maintains a panel of solar cells of area 4.59 m2 perpendicular...
A satellite in Earth orbit maintains a panel of solar cells of area 4.59 m2 perpendicular to the direction of the Sun's light rays. The intensity of the light at the panel is 1.57 kW/m2. (a) At what rate does solar energy arrive at the panel? (b) At what rate are solar photons absorbed by the panel? Assume that the solar radiation is monochromatic, with a wavelength of 550 nm, and that all the solar radiation striking the panel is...
Nuclear fusion reactions at the center of the sun produce gamma-ray photons with energies of order...
Nuclear fusion reactions at the center of the sun produce gamma-ray photons with energies of order 1 MeV (106 eV). By contrast, what we see emanating from the sun's surface are visible-light photons with wavelengths of order 500 nm. A simple model that explains this difference in wavelength is that a photon undergoes Compton scattering many times - in fact, about 1026 times, as suggested by models of the solar interior - as it travels from the center of the...
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...
(3) Solar power for a house 03 W/m2. Sunlight arriving at the surface of the earth has an intensity of about l The roof of a house is 30 ft by 60 ft in size. what is the maximum power arriving at...
(3) Solar power for a house 03 W/m2. Sunlight arriving at the surface of the earth has an intensity of about l The roof of a house is 30 ft by 60 ft in size. what is the maximum power arriving at the roof? (Hint: This will be at noon with the sun directly overhead.) Estimate the average power during daytime on a clear day having 12 hours of daylight (sunrise to sunset) Estimate the average power over a complete...
A green leaf has a surface area of 2.10 cm2. If solar radiation is 1200 W/m2...
A green leaf has a surface area of 2.10 cm2. If solar radiation is 1200 W/m2 , how many photons strike the leaf every second? Assume three significant figures and an average wavelength of 504 nm for solar radiation.
Radiation from the Sun reaching Earth (just outside the atmosphere) has an intensity of 1.38 kW/m2....
Radiation from the Sun reaching Earth (just outside the atmosphere) has an intensity of 1.38 kW/m2. (a) Assuming that Earth (and its atmosphere) behaves like a flat disk perpendicular to the Sun's rays and that all the incident energy is absorbed, calculate the force on Earth due to radiation pressure. (b) For comparison, calculate the force due to the Sun's gravitational attraction. Assume that the speed of light and Earth radius are 2.998 × 108 m/s and 6.37 thousand km...
Electromagnetic Waves UV Radiation Some of us are all too familiar with the ill- effects of...
Electromagnetic Waves UV Radiation Some of us are all too familiar with the ill- effects of over-exposure to ultraviolet (UV) electromagnetic radiation, namely, sunburns (solar erythema). UV radiation can kill the skin cells immediately below the surface (part of the epidermal layer). Over the course of several minutes or several hours, as enough skin cells are killed or damaged, the body's natural immune response is triggered. The body responds to the damage with increased blood flow to the capillary bed of...
Options Question 5 A proton and a neutron traveling at the same speed enter a uniform...
Options Question 5 A proton and a neutron traveling at the same speed enter a uniform magnetic field. The velocity vector of each partide is perpendicular to the magnetic field. Which of the follow statements best describes their motions? The paths of both particles will curve in the same direction, and the radi of the two trajectories will be equal The paths of both particles will curve in opposite directions, and the radil of the two trajectories will be equal...
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...
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...
(3) Solar power for a house 03 W/m2. Sunlight arriving at the surface of the earth has an intensity of about l The roof of a house is 30 ft by 60 ft in size. what is the maximum power arriving at the roof? (Hint: This will be at noon with the sun directly overhead.) Estimate the average power during daytime on a clear day having 12 hours of daylight (sunrise to sunset) Estimate the average power over a complete...
Radiation from the Sun reaching Earth (just outside the atmosphere) has an intensity of 1.38 kW/m2. (a) Assuming that Earth (and its atmosphere) behaves like a flat disk perpendicular to the Sun's rays and that all the incident energy is absorbed, calculate the force on Earth due to radiation pressure. (b) For comparison, calculate the force due to the Sun's gravitational attraction. Assume that the speed of light and Earth radius are 2.998 × 108 m/s and 6.37 thousand km...
Options Question 5 A proton and a neutron traveling at the same speed enter a uniform magnetic field. The velocity vector of each partide is perpendicular to the magnetic field. Which of the follow statements best describes their motions? The paths of both particles will curve in the same direction, and the radi of the two trajectories will be equal The paths of both particles will curve in opposite directions, and the radil of the two trajectories will be equal...
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