1. Consider and electric field E = [100e0e+ 20e-150 mn. Cy+40210 ele Express this as a measurable electric field at 100 MHz frequency 2. A wave is specified by y = 8cos2n(2t - 0.82), where y is expressed in micrometers and the propagation constant is given in um. Find (a) the amplitude, (b) the wavelength (c) the angular frequency (d) the displacement at time t = 0 and 2 = 4 3. What are the energies in electron volts (eV) and the values of propagation constant k of light at wavelengths of 820 nm, 1320 nm and 1550 nm? 4. Light traveling in air strikes a glass plate at an angle 0 = 33, where 0, is measured between between the incoming ray and the glass surface. Upon striking the glass, part of the beam is reflected and part is refracted. If the refracted and reflected beams make 90 with each other, what is the refractive index of the glass? What is the critical angle of the glass? 5. A point source of light is 12 cm below the surface of a large body of water (n=4/3). What is the radius of the largest circle on the water surface through which the light can emerge?