Suppose, for the sake of argument, that instead of scattering blue light, the air scattered greenlight. What color would the Sun look to the human eye (remember: the sunlight hitting the top of the Earth's atmosphere is close to white in color)?

	A.	Bluish
	B.	Reddish
	C.	Purplish (magenta)
	D.	Black

An electromagnetic wave traveling through space encounters an electron sitting at rest. Upon being hit by the wave, which way will the electron move?

	A.	It will bob up and down with the crests and troughs
	B.	It'll be pushed entirely along the direction the wave is moving (perpendicular to the crests and troughs)
	C.	It won't move at all
	D.	It'll both bob up and down and be pushed along the direction the wave is moving

The reason why light reflected off a surface often has significant horizontal polarization is that

	A.	The atoms reflecting the light can only oscillate at specific frequencies
	B.	The atoms reflecting the light can only wiggle parallel to the direction they're re-emitting the light, so they can't produce light having polarization vertical to the surface
	C.	The atoms reflecting the light can only wiggle perpendicular to the direction they're re-emitting the light, so they can't produce light having polarization vertical to the surface
	D.	None of the above

How much of the incident light is transmitted through the third polarizer? 0 = 450 .V Unpolarized light Polarizer 1 Polarizer 2 Polarizer 3 O A. All O B. Some O C. None ?)What type of photon does the transition pictured below {a drop from n24 to n22) emit? (HINT: you will need to look up the wavelengths for different hydrogen transitions, either in the lecture slides or online, and compare those to the known wavelengths ofthe rainbow). O A. Absorption of UV light 0 B. Emission of blue light 0 C. Absorption of green light 0 D.Emission of orange light