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PH2021C Test 3 (Apr. 4, 2008, 10:00am10:50am)
•
You may not open the textbook nor notebook.
•
A letter size information may be used.
•
A calculator may be used. However, mathematics or physics formula programmed in a calculator may
not be used.
•
Write down, reasoning, calculation and answer in the blank space after each problem. Use the back
side of the sheet if necessary.
•
Answers in symbolic mathematical forms without numerical calculation are allowed without penalty.
If you prefer numerical calculation, you do not have to complete the final line of calculation. In this
case, your answer should be one numerical equation which the instructor can enter to a calculator.
(Mathematical procedure written in words is not considered as a solution.)
•
Answers without reasonable explanation or mathematical derivation will receive no point.
Partial
credit may be given to correct reasoning and mathematical procedures even if your final answers are
wrong. However, if the final answer is too obviously wrong, a partial credit may not be given.
Important Physical Constants:
Speed of light in vacuum:
c
= 2
.
99792458
×
10
8
m/s
SCORE
1
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[10 pts.] In vacuum, an electronmagnetic wave has speed
c
== 2
.
99792458
×
10
8
m/s
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 Fall '09
 GEIST
 Thin lens

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