The Speed of Light in a Certain Material Is Measured $2.2 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s }$

The speed of light in a certain material is measured to be $2.2 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s }$ . What is the index of refraction of this material? $\left( c = 3.0 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } \right)$

A) $1.8$
B) $1.1$
C) $1.4$
D) $1.2$
E) $1.6$

Correct Answer:

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