Aplane wave traveling in a medium with r: : 16 is normally incident upon a second medium with e2-9. both media are made of nonmagnetic, non-conducting materials. if the magnetic field of the incident plane wave is given by 2 2 cos(2r x 10t -ky) (a/m) a) obtain time-domain expressions for the electric and magnetic fields in each of the two (b) determine the average power densities of the incident, reflected, and transmitted media. waves.
Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.
In a house there are 20 filament bulbs each of 100w, three heaters of 2000w & 20 tubes of each 40w. all these appliances work for 5 hours a day and a very high electricity bill has come. what solution you can suggest for this issue? support your answer with proper mathematical explanations