Which expression gives the speed of light v in a substance in terms of the index of refraction n of a substance and the speed of light c in a vacuum?
a. v = c/n
b. v = c n
c. v = c + n
d. v = n/c
e. v = c/n2
a
You might also like to view...
If two vectors point in opposite directions, their cross product must be zero
A) True B) False
An aircraft that flies faster than the speed of sound is said to be
A) subsonic. B) supersonic. C) impossible. D) none of the above
Two loops of wire are arranged so that a changing current in one, the primary, will induce a current in the other, the secondary. The secondary loop has twice as many turns as the primary loop. The current in the primary at this moment is 3 A and increasing. The current in the secondary must be
a. 3 A. b. 6 A. c. zero. d. There is insufficient information to work this problem.
In an LCR series circuit, if the AC frequency is increased to a very large value, what value does the magnitude of the angle between the current and voltage phasors approach?
a. 0° c. 180° b. 45° d. 90°