When light goes from one medium to another medium with a different index of refraction, which of the following do (does) NOT change?

A. the speed
B. the wavelength
C. the frequency
D. the speed and the wavelength
E. the frequency and the wavelength


C. the frequency

Physics & Space Science

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The Great Red Spot on Jupiter is ________.

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A plastic rod is charged up by rubbing a wool cloth, and brought to an initially neutral metallic sphere that is insulated from ground. It is allowed to touch the sphere for a few seconds, and then is separated from the sphere by a small distance

After the rod is separated, the rod A) is repelled by the sphere. B) is attracted to the sphere. C) feels no force due to the sphere.

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What is the period of a signal that has a frequency of 60 Hz?

a. 60 s c. 1/60 s b. 60 s-1 d. not determinable

Physics & Space Science