The index of refraction of diamond is 2.42. This means that a given wavelength of light travels
A) 2.42 times faster in air than it does in diamond.
B) 2.42 times faster in diamond than it does in vacuum.
C) 2.42 times faster in vacuum than it does in diamond.
D) 2.42 times faster in diamond than it does in air.
E) 2.42 times faster in vacuum than it does in air.
C
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If a 0.20 pF capacitor has a voltage of 40 mV, how many more electrons are on the negative plate than on the positive plate?
a. 
b. 
c. 
d. 
e. none, the electrons are in equal numbers on the plates
A light ray strikes a hexagonal ice crystal floating in the air perpendicular to one face, as shown below. The hexagonal faces of the crystal are perpendicular to the plane of the page. All the rays shown are in the plane of the page, and nice = 1.30. Which outgoing ray is correct when the incoming ray strikes the crystal face on the left head on?
a.
A
b.
B
c.
C
d.
D
e.
E
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Fill in the blank(s) with correct word