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Light in a vacuum has a frequency of 5.0x10^15 Hz. What is the frequency of the...

Light in a vacuum has a frequency of 5.0x10^15 Hz.

What is the frequency of the light in a medium with index of refraction 2.0?

a.

10.0x10^15 Hz
b.

5.0x10^15 Hz
c.

2.5x10^15 Hz
d.

5.0x10^14 Hz
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