A parallel polarized wave in air is incident onto a dielectr

A parallel polarized wave in air is incident onto a dielectric medium with Epsillonr = 2.6 at an angle of incidence of 50 degrees.

a. What is the transmission angle?

b. If the ampltitude of the x-component of the electric field of the incident wave is 2 V/m, determine the ampltitude of the x-component of the electric field of the transmitted wave.

c. for what angle of incidence will there be total transmission?

Solution

A)Lasers are used in CD and DVD players, bar-code readers, eye surgery and multitudes of other systems and applications. A laser—acronym for light amplification by stimulated emission of radiation—is a source of monochromatic (single wavelength), coherent (uniform wavefront), narrow-beam light, in contrast with other sources of light (such as the sun or a light bulb) which usually encompass waves of many different wavelengths with random phase (incoherent). A laser source generating microwaves is called a maser. The first maser was built in 1953 by Charles Townes and the first laser was constructed in 1960 by Theodore Maiman.

A bar code consists of a sequence of parallel bars of certain widths, usually printed in black against a white background, configured to represent a particular binary code of information about a product and its manufacturer. Laser scanners can read the code and transfer the information to a computer, a cash register, or a display screen. For both stationary scanners built into checkout counters at grocery stores and handheld units that can be pointed at the bar-coded object like a gun, the basic operation of a bar-code reader is the same.

1 = 0 = 120 (),2 = 0 r = 120 5 = 24 ().

= 2 1 2 +1 = 24120 24+120 = 96 144 = 0.67