A disc with area A is parallel to wavefronts coming from an isotropic point source a...
A disc with area A is parallel to wavefronts coming from an isotropic point source a distance of 500 m away. The point source has a power output of 850 W. If the power received by the disc is 3.38 x 10^-5 W, calculate the area A.
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A disc with area A is parallel to wavefronts coming from an
isotropic point source a...
Problem 3: Intensity from a distant light source (25 points) Consider an isotropic light source that...
Problem 3: Intensity from a distant light source (25 points) Consider an isotropic light source that emits EM radiation with wavelength A and power Po. (Isotropic- uniformly in all directions). In addition, consider a detector with area a, facing the source which is a long distance R away. (a) Derive a formula for the amplitude of the electric field at the detector (b) Derive a formula for the number of photons per unit time that strike the detector. What is...
An isotropic point source emits light at wavelength 470 nm, at the rate of 230 W....
An isotropic point source emits light at wavelength 470 nm, at the rate of 230 W. A light detector is positioned 410 m from the source. What is the maximum rate dB/dt at which the magnetic component of the light changes with time at the detector's location? The speed of light is c = 3 × 108 m/s, and μ0 = 4π × 10-7 H/m.
A 1 Curie isotropic point source that emits one 400 keV photon per decay is located...
A 1 Curie isotropic point source that emits one 400 keV photon per decay is located at the center of a spherical tungsten shield with mass density 19.3 g/cm^3 and atomic mass 183.84 g/mol. with a radius of 2.5 cm. The microscopic cross section of the tungsten at this energy is 55 b. Determine the uncollideed scalar flux a distance of 30 cm away from the source. Negelect photon collisions outside the shield and treat it like a vacuum.
16. Very far away from the source of the EM wave, you can often treat it...
16. Very far away from the source of the EM wave, you can often treat it as a plane At the location of your detector, which is in vacuum, suppose that you magnitude and direction of the electric field of an EM wave is given by wave. find that the E Eo cos (ot - kz)X (a) Give an exact expression for the magnitude and direction of the magnetic field in the wave: (b) In wh at direction will your...
5. A point source emits a sound with an average power output of 80.0w. a) What...
5. A point source emits a sound with an average power output of 80.0w. a) What is the intensity of the sound 3.00m away from the source? b) How far away from the source would you have to be to experience an intensity of 1.00x108 W/m2?
Someone plans to float a small, totally absorbing sphere 0.532 m above an isotropic point source...
Someone plans to float a small, totally absorbing sphere 0.532 m above an isotropic point source of light, so that the upward radiation force from the light matches the downward gravitational force on the sphere. The sphere's density is 20.8 g/cm3, and its radius is 2.34 mm. (a) What power would be required of the light source? (b) Even if such a source were made, would the support of the sphere be unstable? Assume that the speed of light is...
1.) If light spreads out in all directions, as it does from a point source, the...
1.) If light spreads out in all directions, as it does from a point source, the intensity at a certain distance from the source depends on the area over which the light is spread Light Light source Sphere a.) For a sphere of radius r, what is the equation for the surface area A? b.) Intensity is calculated by taking the power output of the light source divided by the area over which the light is spread: Where I is...
The intensity from a point source of waves at a distance of 1 m from the...
The intensity from a point source of waves at a distance of 1 m from the source is 10 W/m^2. At a distance of 10 m the intensity is 1000 W/m^2 100 W/m^2 1 W/m^2 0.1 W/m^2 0.01 W/m^2
A point source of sound generates a 200 Hz tone. The wave has an intensity of...
A point source of sound generates a 200 Hz tone. The wave has an intensity of 2.2×10−8 W/m2 at a distance of 3 m from the source. Find the total sound power at the source. At what distance from the source is the decibel level below 15 dB? What is the intensity of the sound at this distance?
Name: UIN: - - - - - - Problem 5 Source 1 Source-1 in the figure...
Name: UIN: - - - - - - Problem 5 Source 1 Source-1 in the figure emits electromagnetic radiation of 15 MHz in every direction with an average power of 800 W. The radiation is detected at point P F 125 m located 125 m away from the source. (a) [4 points] Calculate the intensity of the radiation and the amplitude of the electric field at P. — Source 1 Source 2 A second coherent source, in phase with Source-1,...
Problem 3: Intensity from a distant light source (25 points) Consider an isotropic light source that emits EM radiation with wavelength A and power Po. (Isotropic- uniformly in all directions). In addition, consider a detector with area a, facing the source which is a long distance R away. (a) Derive a formula for the amplitude of the electric field at the detector (b) Derive a formula for the number of photons per unit time that strike the detector. What is...
16. Very far away from the source of the EM wave, you can often treat it as a plane At the location of your detector, which is in vacuum, suppose that you magnitude and direction of the electric field of an EM wave is given by wave. find that the E Eo cos (ot - kz)X (a) Give an exact expression for the magnitude and direction of the magnetic field in the wave: (b) In wh at direction will your...
5. A point source emits a sound with an average power output of 80.0w. a) What is the intensity of the sound 3.00m away from the source? b) How far away from the source would you have to be to experience an intensity of 1.00x108 W/m2?
1.) If light spreads out in all directions, as it does from a point source, the intensity at a certain distance from the source depends on the area over which the light is spread Light Light source Sphere a.) For a sphere of radius r, what is the equation for the surface area A? b.) Intensity is calculated by taking the power output of the light source divided by the area over which the light is spread: Where I is...
The intensity from a point source of waves at a distance of 1 m from the source is 10 W/m^2. At a distance of 10 m the intensity is 1000 W/m^2 100 W/m^2 1 W/m^2 0.1 W/m^2 0.01 W/m^2
Name: UIN: - - - - - - Problem 5 Source 1 Source-1 in the figure emits electromagnetic radiation of 15 MHz in every direction with an average power of 800 W. The radiation is detected at point P F 125 m located 125 m away from the source. (a) [4 points] Calculate the intensity of the radiation and the amplitude of the electric field at P. — Source 1 Source 2 A second coherent source, in phase with Source-1,...
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