An optic fiber is made of clear plastic with index of refraction of 1.50. For what angle of incidence will light remain within the plastic "guide"?
A) >21.1°
B) >23.4°
C) >38.3°
D) >40.3°
E) >41.8°
E
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Diffraction Gratings: A diffraction grating has 450 lines per millimeter. What is the highest order m that contains the entire visible spectrum from 400 nm to 700 nm?
A. m = 2 B. m = 3 C. m = 4 D. m = 5 E. m = 6
When a volume of air is compressed, air temperature
A) increases. B) decreases. C) neither of these
The kinetic energy of the electron in the first Bohr orbit of hydrogen is 2.18 × J
Indicate whether the statement is true or false
The drawing below shows a sequence of Stern–Gerlach devices. By analogy to the cases discussed in the chapter, what do you think are the probabilities that an electron entering the last device will come out of that device’s plus and minus channels, respectively? 
A. 1 and 0, respectively (AA if reversed, i.e., 0 and 1)
B. 0.933 and 0.067, respectively (BB if reversed)
C. 
, respectively (CC if reversed)
D. 
for both channels
E. Some other probabilities (specify)