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light is traveling in air at a speed of 300,000 km/s. which substance would cause the light to refract the most?
a. ruby (speed of light = 170,000 km/s)
b. glass (speed of light = 200,000 km/s)
c. water (speed of light = 225,000 km/s)
d. diamond (speed of light = 120,000 km/s)

D.diamond

Explanation:

Refraction occurs due to the bending of light rays as they pass from one medium to another. The light rays bend as their speed changes as they pass from one medium to another. The more the speed changes, the more the light bends and therefore more refraction occurs. When light passes from air to the diamond, the speed of light decreases more than any of the other materials listed in the given choices. So the light rays slow down the most  diamond and so most refraction occurs in diamond.

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the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas