A ray of light enters a pane of glass with an angle of incidence of 
The index of refraction of the glass is 1.48. What is the angle of incidence on the far side of the pane of glass?
A. 
B. 
C. 
D. 
E. 
B.
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There are several elements that we regard as semiconductors. The common property of these elements is that they have
A. outer electrons which cannot move. B. electrons, which are randomly organized about the nucleus. C. no electrons beyond a closed shell. D. four outer electrons beyond a closed shell.
A wave packet can represent a quantum particle because
a. it has the localized nature of a particle. b. the group velocity is identical to the speed of the particle. c. the waves that compose the packet can show interference and diffraction. d. of all of the above. e. of only (a) and (b) above.
A total lunar eclipse is visible only from the path of totality
a. True b. False Indicate whether the statement is true or false
If you view a hot star through a cool cloud of gas, what sort of spectrum will you see?
A) water B) continuous C) absorption D) emission E) No spectrum is visible.