Calculate the phase velocity of the wave inside the waveguide.
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- Suppose the maximum safe average intensity of microwaves for human exposure is taken to be 1.00 W/m2. If a radar unit leaks 10.0 W of microwaves (other than those sent by its antenna) uniformly in all directions, how far away, ?min, must you be to be exposed to an average intensity considered to be safe? Assume that the power spreads uniformly over the area of a sphere with no complications from absorption or reflection. ?min= m What is the maximum electric field strength ?0 at this distance? The permittivity of free space is ?0=8.854×10−12 C2/(N·m2). The speed of light is ?=3.00×108 m/s. ?0= V/m Note: Early radar units leaked more than modern ones do. This caused identifiable health problems, such as cataracts, for people who worked near them.An intense light source radiates uniformly in all directions. At a distance of 6 m from the source, the radiation pressure on a perfectly absorbing surface is 5.0 x 10-6 Pa. What is the total average power output of the source? (kW)Suppose the maximum safe intensity of microwaves for human exposure is taken to be 1.81 W/m2. If a radar unit leaks 10.0 W of microwaves (other than those sent by its antenna) uniformly in all directions, how far away must you be to be exposed to an intensity considered to be safe? Assume that the power spreads uniformly over the area of a sphere with no complications from absorption or reflection. (Note that early radar units leaked more than modern ones do. This caused identifiable health problems, such as cataracts, for people who worked near them.)
- Consider a monochromatic standing wave in a source-free region where: A) determine the value of the magnetic field at all points in spaceB) determine the energy densityA wave traveling in the +y-direction in a medium where μr = 1, σ = 6.17 X 107 S/m, and with ω = 10X106. The maximum amplitude of the E-wave is 50 mV. Write the instantaneous equations for the electric field (polarized in the x-direction) and magnetic field intensities. Complete solution pleaseA 75-kW radio station broadcasts its signal uniformly in all directions, What is the average intensity of its signal at a distance of 250 m from the antenna?