The index of refraction,n, is calculated as
A. the ratio of the speed of light in the material to that in a vacuum (n=v/c)
B. the ratio of the speed of light in a vacuum to that in the material (n=c/v)
C. the product of the speed of light in a vacuum to that in the material(n=vc)
D. the square root of the speed of light in the material ?n? v?
B. the ratio of the speed of light in a vacuum to that in the material (n=c/v)
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Two speakers in a stereo emit identical pure tones. As you move around in front of the speakers, you hear the sound alternating between loud and zero. This occurs because of
a. interference. b. changing sound level. c. diffraction. d. the Doppler effect. e. shock waves.
Which of the following is true of chromatic aberration?
A) It mostly occurs in reflecting telescopes. B) It occurs when different colors are focused at slightly different distances. C) It is a natural phenomenon that occurs because of high turbulence in Earth's atmosphere. D) It is the main cause of seeing.
Why couldn't life have originated on the Moon or Mercury?
What will be an ideal response?
The average force required to accelerate a 0.20-kg ball from rest to 30 m/s in 0.002 s is
A. 15,000 N. B. 3,000 N. C. 0.003 N D. 75,000 N.