An optical fiber is made of clear plastic with index of refraction n = 1.50 . For what angles with the surface will light remain within the plastic "guide"?
a. j < 66.6°
c. j < 51.7°
b. j < 41.8°
d. j < 57.1°
B
Physics & Space Science
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Parallax would be easier to measure if
a. Earth's orbit was larger. b. the stars were farther away. c. Earth moved faster along its orbit. d. all of these e. none of these
Physics & Space Science
The surface of the inclined plane shown is frictionless. If F = 30 N, what is the magnitude of the force exerted on the 3.0-kg block by the 2.0-kg block?
A. 18 N B. 27 N C. 24 N D. 21 N E. 15 N
Physics & Space Science
A lunar month is about 28 days. If the Moon were farther from Earth than it is now, the lunar month would be
A) more than 28 days. B) less than 28 days. C) about 28 days.
Physics & Space Science
The amount of energy a photon carries depends on its wavelength
a. True b. False Indicate whether the statement is true or false
Physics & Space Science