Question

Solve this:

$$\begin{gathered} \mathbf{23}\mathbf{.}Therefractiveindexofwateris\frac{4}{3}.Ifthespeedoflightinairis3\times {10}^{8}m/s,thenthespeedoflightinwateris \\ \left(1\right)2.25\times {10}^{8}m/s\left(2\right)2.75\times {10}^{8}m/s \\ \left(3\right)1.5\times {10}^{8}m/s\left(4\right)3\times {10}^{8}m/s \end{gathered}$$

Answer 1

Dear Student,


$$\begin{gathered} speedogflightinwater=\frac{3*{10}^8}{4/3}=2.25*{10}^{8}m/s \\ Regards \end{gathered}$$