A light beam has speed $c$ in vacuum and speed $v$ in a certain plastic. The index of refraction $n$ of this plastic is
A) $n = ( c / v ) ^ { 2 }$.
B) $n = c / v$.
C) $n = ( v / c ) ^ { 2 }$.
D) $n = v / c$.
E) $n = c v$.

Name: A light beam has speed $c$ in vacuum and speed $v$ in a certain plastic. The index of refraction $n$ of this plastic is A) $n = ( c / v ) ^ { 2 }$. B) $n = c / v$. C) $n = ( v / c ) ^ { 2 }$. D) $n = v / c$. E) $n = c v$.
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Question

Quizplus · Accepted Answer

The Answer is B

A Light Beam Has Speed ccc In Vacuum and Speed vvv In a Certain Plastic

A Light Beam Has Speed $c$ In Vacuum and Speed $v$ In a Certain Plastic