A 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.

Assume the mostly infrared radiation from a heat lamp acts like a continuous wave with wavelength 1.50 µm. (a) If the lamp's 205 W output is focused on a person's shoulder, over a circular area 24.0 cm in diameter, what is the intensity in W/m2? 2266.9 W/m2 (b) What is the peak electric field strength in kV/m? 0.924 X kV/m (c) Find the peak magnetic field strength in µT. 3.08 X µT (d) How long will it take in seconds to increase the temperature of the 3.80 kg shoulder by 2.00°C, assuming no other heat transfer and given specific heat is 3.47 x 103 J/(k • °C)? 128.64

Starting from Maxwell's equations V × V × A = V(V· A) – V²A | in a vacuum, use the identity and show that the electric and magnetic fields satisfy both the equation of a wave and obtain the speed of that wave in the MKS system.

VHF, or very high frequency, refers to radio frequency electromagnetic waves in the range 30 to 300 MHz. In the U.S., television stations broadcast channels 2 through 13 in the VHF range between 54.0 MHz and 216 MHz, with ranges 72.0 to 76.0 MHz and 88.0 to 174 MHz not utilized for TV broadcasting. Each channel has a frequency width of 6.00 MHz. The table below gives the lower and upper frequency of each channel. Channel Lower edge (MHz) Upper edge (MHz) 2 3 4 5 6 7 8 9 10 11 12 13 54 60 66 76 82 174 180 186 192 198 204 210 m m m m 60 66 m 72 m 82 88 180 186 (a) Calculate the broadcast wavelength range for channel 2. (Enter your answers from smallest to largest, in m.) smallest value largest value 192 198 204 (b) Calculate the broadcast wavelength range for channel 3. (Enter your answers from smallest to largest, in m.) smallest value largest value 210 216 (c) Calculate the broadcast wavelength range for channel 5. (Enter your answers from smallest to largest, in m.) smallest value…

Please help with A, B, and C

Grass grows densely everywhere on a 0.300 acre plot of land. What is the approximate number of blades of grass on this plot of land? Suppose each blade occupies 1/10 in2 of area. (1 acre = 43 560 ft2.) With Significant Figures considered.

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 density

Which one of the following statements is true of an electromagnetic (EM) wave? OEM waves carry electrical charge. EM waves consist of transverse oscillating electric and magnetic fields. OEM waves do not carry energy. EM waves travel at different speeds in a vacuum, depending on their frequency.

A certain guided wave travels through air with the following magnetic field H=10+ y cos(157x) sin[(67×10° rad/s)t - Bz] [A/m] (0.3) Find the associated and B. There are a couple ways to solve this problem. Note: this is NOT a plane wave, and be sure to understand why. Nevertheless it IS a valid solution of Maxwell's equations. You will see how guided waves like this come about