Chromatic aberration occurs in a ____ telescope when ____
a. reflecting; different colors of light do not focus at the same point.
b. refracting; different colors of light do not focus at the same point.
c. reflecting; light of different wavelengths get absorbed by the mirror.
d. refracting; light of different wavelengths get absorbed by the lens.
B
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It is correct to say that in electric circuits
A) charge flows through a circuit. B) flowing charge is current. C) voltage is applied across a circuit. D) voltage is the ratio of energy per charge. E) all of the above
Celestial latitude is called
a. declination. b. right ascension. c. the parsec value. d. the zenith angle.
Estimation: Estimate the thickness, in meters, of an ordinary sheet of paper.
A. 10-4 m B. 10-5 m C. 10-6 m D. 10-7 m E. 10-8 m
Boltzmann's constant, kB, may be derived as a function of R, the universal gas constant, and NA, Avogadro's number. Which expresses the value of kB?
a. NAR2 b. NAR c. R/NA d. NA/R