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AP® Physics 1 & 2

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Moderate

Use Speed to Calculate Index

APPH12-OUNBUW

What is the index of refraction of a substance where light travels at a speed of $2.0\times { 10 }^{ 8 } \text{ m/s}$?

A

$0.5$

B

$0.67$

C

$1.5$

D

$2$