Which
phenomenon can occur with light, but not with sound?
A.
Doppler effect
B.
Interference
*C.
Polarization
D.
Refraction
The threshold frequency of a photo emissive surface is 7.0 x 1014 hertz. Which
electromagnetic radiation, incident upon the surface, will produce the greatest
amount of current?
A.
Low intensity infrared radiation
B.
High intensity infrared radiation
C.
Low intensity UV radiation
*D.
High intensity UV radiation
A spherical mirror that forms only virtual images has a radius of curvature of
.5 meters. The focal length of this mirror is?
A.
-.125 m
*B.
-.25 m
C.
2.5 m
D.
2.75 m
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