describe the propagation of light waves travelling from free space into dielectric medium in terms of their wavelengths, speeds and frequencies, just before and after entering the medium. Explain the reason for the change in their properties.
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describe the propagation of light waves travelling from free space into dielectric medium in terms of their wavelengths, speeds and frequencies, just before and after entering the medium. Explain the reason for the change in their properties.
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- For time varying fields, the electric field is not conservative. Why? Explain withmathematical substantiations.3. Biologists often study the patterns of migratory birds by using radar (1-10 GHz electromag- netic waves) to track their flight. To check whether radar waves influence the birds' flight, researchers tracked the birds visually, both with the radar on and with it off. The 9 GHz radar waves had an intensity of 400 W/m² at 250 m. What was the amplitude of the electric field at this distance? (The experiments showed that the radar did not affect the birds.)The NOAA Space Weather Scales describe three types of space weather storms: Geomagnetic storms, Solar Radiation storms, and Radio Blackouts. A single large solar event can result in all three types of storms being observed at Earth. Assuming a single solar event causes all three to occur, in what order would we expect to observe the three storms? Choose the correct order from the options below. The storms are listed by arrival time, from first to last. A. First Geomagnetic, then Solar Radiation, then Radio Blackout. B. First Solar Radiation, then Radio Blackout, then Geomagnetic. C. First Radio Blackout, then Geomagnetic, then Solar Radiation. D. First Geomagnetic, then Radio Blackout, then Solar Radiation. E. First Radio Blackout, then Solar Radiation, then Geomagnetic. F. First Solar Radiation, then Geomagnetic, then Radio Blackout.
- Write down the Maxwell-Ampere law in integral or differential form (your choice). Write down the meaning of every letter and symbol and explain in detail what the equation is trying to tell you.Part A Estimate the rms electric field in the sunlight that hits Mars, knowing that the Earth receives about 1350 W/m? and that Mars is 1.52 times farther from the Sun (on average) than is the Earth. ? Erms = V/mE-nduced. Which of the following statements are TRUE regarding induced electric fields? I. In any closed path, the work done by an induced electric field in moving a charge is zero. II. An electric potential can be derived from induced electric field. III. Induced electric field is produced only when magnetic flux is varying in time. O A. I only OB. II only OC. Ill only O D. All of the above 18
- An electron with kinetic energy ? is traveling along the positive ?-axis, which is along the axis of a cathode‑ray tube, as shown in the figure. There is an electric field ?=14.0×104 N/C pointed in the positive ?-direction between the deflection plates, which are 0.0600 m long and are separated by 0.0200 m. Determine the minimum kinetic energy ?min the electron can have and still avoid colliding with one of the plates.Fill the blank spaces for the list of properties of the Electromagnetic waves and EM spectrum: 1) In EM waves, E , B and the wave direction are mutually 2) EM waves travel through space, carry and transfer to the objects. 3) In electromagnetic spectrum, have the lowest wavelength. 4) Of the seven different EM waves, is used for security purposes.5. Calculate the Poynting Vector inside an ideal coaxial cable. Show that the energy current in V² the cable (integral of the energy current density over a cross section) equals "Ideal" means Z that conductors have no resistance and dielectric has no conductance.
- +1 + + + + + + + + + + + + +0 •P what is the electric field За -2 3- 230080 value at point P in the middle? pR00804340 4kλ/3a 3-23008 200804340 4kλ/a 3-230080 42300 8kA/3a 200804340 13-23008 2300 200804340 2kλ/3a 3- 23008u b20 13-25 2300 200804340 3-23008 b20 43- 25 2300 300804340 3- 23008 13-25 2300 b200100043 - 23008 13-250 2300804340 43-25 b200100043 - 23008 13- 2300804340 00100043 - 23008MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The helium-neon lasers most commonly used in student physics laboratories have average power outputs of 0.250 mW. (a) If such a laser beam is projected onto a circular spot 2.48 mm in diameter, what is its intensity? 12.945 What is the relationship between power and intensity? Are you given a radius or a diameter? W/m? (b) Find the peak electric field strength. 92.75 What is the relationship between intensity and electric field strength? V/m (c) Find the peak magnetic field strength. 3.3e-8 What is the relationshin between electric field strength and magnetic field strenath in an electromagneti wave?TÉ=-V ¢ where is the electric potential. One of Maxwell's Equations for EM is VE where p is the charge density. O Combine these two equations to get an expression for the dependence of ø on p.