When light in vacuum is incident at the polarizing angle (brewster's angle) on a certain glass slab, the angle of refraction is 31.8 degree. calculate the values of : i): the polarizing angle theta_p of the glass.
ii): the index of refraction, n, of the glass.

Air initially at 0.75 bar, 1000 k, and occupying a volume of 0.12 m^3 undergoes two processes. process 1-2: the air is compressed isothermally until the volume is halved. process 2-3: the air undergoes a constant pressure process until the volume is halved again. assume ideal gas behavior. a) determine the mass of the air, in kg. b) the work and the heat transfer for each of the two processes, in kj. (100 kj = 1 bar . m^3)

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon

What is the increase in density of a medium due to wave travel?