Strictly speaking, if a beam of white light is shone through a piece of very thick glass, the first color to emerge from the other side is
1) white.
2) violet.
3) red.
4) green.
This is because
5) all frequencies travel at c.
6) lower frequencies undergo more refraction in a medium.
7) higher frequencies of light travel at a faster average speed through a medium.
8) higher frequencies of light interact with more molecules in a medium.
Question 2
Refer to the figure above. When the switch is closed in the primary circuit,
1) voltage is established in the primary coil
2) a current is established in the primary coil
3) a magnetic field builds up around the primary coil
4) all of the above
and a voltage is induced in the secondary circuit principally because
5) of the voltage in the primary.
6) of the change of current in the primary.
7) the expanding magnetic field about the primary is sensed by the secondary.
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