When certain light rays pass from a vacuum into a block of an unknown material, the

measured index of refraction of the material is $3\mathrm{.}00.$

A$)9\mathrm{.}9106$ m$/$s

B$)4\mathrm{.}8107$ m$/$s

C$)1\mathrm{.}0108$ m$/$s

D$)1\mathrm{.}9108$ m$/$s

E$)2\mathrm{.}9108$ m$/$s

Ans: C

Difficulty: Medium SectionDef: Section $26-1$

What is the speed of light inside the block?