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Re: what good is "percentage error"?



Another comment on student understanding of percent: I assigned the
following problem from Hecht's Physics--Calculus:
"What should be the index of refraction of a medium if it is to reduce
the speed of light by 10% as compared to its speed in vacuum?"
A LARGE number of students could not understand this question!
--
Martha Takats
Department of Physics and Astronomy
Ursinus College
Collegeville, PA 19426