. Can EM waves travel through a perfect vacuum? Can soundwaves?

Hz goes into th an index of 17 AM Wed Nov 16 bconline.broward.edu 0445 VIS CIR FOT 6. An ideal polarizer with its transmission axis rotated 30° to the vertical is placed in a beam of unpolarized light of intensity 10 W/m². After passing through the polarizer, what is intensity of the beam? a) 10 W/m² b) 5.0 W/m² c) 8.7 W/m² d) 7.5 W/m² 76%

3. What is the maximum electric field strength of an electromagnetic wave whose maximum magnetic field strength is 0.75 T?

Combing your hair leads to excess electrons on the comb. How fast (in Hz) would you have to move the comb up and down to produce violet light? (Assume ? = 405 nm.)

This is not a grade question

6. A radio station is radiating EM waves with an average power of Pave = 500 kW from its vertical antenna whose length is L = 20 m. Assume that the radiation is cylindrically symmetric around this antenna. a) What is the average intensity of the laser light at a distance of 2.2 km from the source point? b) What is the radiation presure of the laser light at this distance on a totally reflective surface? c) What are the maximum values of the electric and magnetic fields at this distance? d) If the frequency of this EM wave is 10° Hz, figure out the electric and magnetic field vectors as a function of time and space at this distance. (Write E along y, and B along z direction.) e) Write the Poynting vector for this EM wave?

FM radio wave at 150 MHz travels along the x-axis with a magnetic field polarized along the z axis, width Bmax = 10^-4 T. The wave is reflected οn metal surface which intersects vertically the course of the wave at position x = 0. After reflection, the electric field changes phase by 180o but its width as well as its magnetic field remains the same. a) Write the expressions for the electric and the magnetic field of the incident and reflected EM wave. b) Calculate the parameters λ, β, ω, Ε max, the intensity and density of energy per unit volume of the EM field, as well as the force exerted by the EM radiation on surface if it has an area of ​​500 m^2. (c = 3x10^8 m/s, μ0, ε0 known).

On its highest power setting, a certain microwave oven projects 0.75 kW of microwaves onto a 20 by 35 cm area. (a) What is the intensity in W/m2? W m² (b) Calculate the peak electric field strength Eo in these waves. V m (c) What is the peak magnetic field strength Bo? T Submit Question

If an EM wave has an electric field of 5E5 N/C, what is the total energy density?

How is the potential energy associated with an electromagnetic wave shared between the electric and magnetic fields? O there is no potential energy associated with an electromagnetic wave more of the energy is in the electric field it is equally shared between them O more of the energy is in the magnetic field