Please answer all questions.

1			A vertical electric dipole antenna
			A)	radiates uniformly in all directions.
			B)	radiates uniformly in all horizontal directions, but more strongly in the vertical direction.
			C)	radiates most strongly and uniformly in the horizontal directions.
			D)	does not radiate in the horizontal directions.
2			A certain star is 14 million light-years from Earth. The intensity of the light that reaches Earth from the star is 4 × 10-21 W/m2. At what rate does the star radiate EM energy?
			A)	9 × 1026 W
			B)	1 × 1026 W
			C)	5 × 1026 W
			D)	2 × 1026 W
3			The speed of an electromagnetic wave in vacuum depends on
			A)	the amplitude of the electric field but not on the amplitude of the magnetic field.
			B)	the amplitude of the magnetic field but not on the amplitude of the electric field.
			C)	the amplitude of both fields.
			D)	the angle between the electric and magnetic fields.
			E)	the frequency and wavelength.
			F)	none of the above.
4			Light of wavelength 692 nm in air passes into window glass with an index of refraction of 1.52. (a) What is the wavelength of the light inside the glass? (b) What is the frequency of the light inside the glass?
			A)	(a) 451 nm; (b) 4.62 × 1014 Hz
			B)	(a) 455 nm; (b) 4.34 × 1014 Hz
			C)	(a) 447 nm; (b) 4.71 × 1014 Hz
			D)	(a) 451 nm; (b) 4.71 × 1014 Hz
			E)	(a) 455 nm; (b) 4.62 × 1014 Hz
5			An electromagnetic wave is created by
			A)	all electric charges.
			B)	an accelerating electric charge.
			C)	an electric charge moving at constant velocity.
			D)	a stationary electric charge.
			E)	a stationary bar magnet.
			F)	a moving electric charge, whether accelerating or not.
6			If the wavelength of an electromagnetic wave is about the diameter of an apple, what type of radiation is it?
			A)	X-ray
			B)	UV
			C)	Infrared
			D)	Microwave
			E)	Visible light
			F)	Radio wave
7			How long does it take light to travel from this text to your eyes? Assume a distance of 50.0 cm.
			A)	1.81 ns
			B)	1.41 ns
			C)	1.67 ns
			D)	1.59 ns
8			A beam of light is linearly polarized. You wish to rotate its direction of polarization by 90° using one or more ideal polarizing sheets. To get maximum transmitted intensity, you should use how many sheets?
			A)	1
			B)	2
			C)	3
			D)	As many as possible
			E)	There is no way to rotate the direction of polarization 90° using polarizing sheets.
9			The solar panels on the roof of a house measure 2.0 m by 6.0 m. Assume they convert 35% of the incident EM wave's energy to electrical energy. (a) What average power do the panels supply when the incident intensity is 1.0 kW/m2 and the panels are perpendicular to the incident light? (b) What average power do the panels supply when the incident intensity is 0.40 kW/m2 and the light is incident at an angle of 60.0° from the normal?
			A)	(a) 4.2 kW; (b) 840 W
			B)	(a) 4.4 kW; (b) 840 W
			C)	(a) 4.2 kW; (b) 810 W
			D)	(a) 4.7 kW; (b) 840 W
			E)	(a) 4.7 kW; (b) 810 W
10			The Sun is directly overhead and you are facing toward the north. Light coming to your eyes from the sky just above the horizon is
			A)	partially polarized north-south.
			B)	partially polarized east-west.
			C)	partially polarized up-down.
			D)	randomly polarized.
			E)	linearly polarized up-down.
11			The speed of light in a certain glass is 1.91 x 108 m/s. What is the refractive index of the glass?
			A)	1.57
			B)	0.64
			C)	1.09
			D)	4.9