That all points on a wave front act as new sources of spherical waves is attributed to:
a. Maxwell.
c. Thomas.
b. Young.
d. Huygens.
D
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The maximum induced emf in a generator whose coils are rotating at 240 rpm is 35 V. If, instead, it is desired to generate a maximum emf of 45 V but with half the magnetic field, what rotation rate must be used?
A. 380 rpm B. 190 rpm C. 310 rpm D. 165 rpm E. 610 rpm
If a sheet containing two very thin slits is heated (without damaging it), what happens to the angular location of the first-order interference minimum?
A) It moves toward the centerline. B) It moves away from the centerline. C) It doesn't change.
An ideal polarizer is placed in a beam of unpolarized light and the intensity of the transmitted light is 1. A second ideal polarizer is placed in the beam with its preferred direction rotated 40° to that of the first polarizer
What is the intensity of the beam after it has passed through both polarizers? A) 0.77 B) 0.64 C) 0.59 D) 0.41 E) 0.30
A unit of angular diameter could be meters
a. True b. False Indicate whether the statement is true or false