Question

What is the speed of light through an unknown glass with an index of refraction of 2.2?

Answer 1

Given:

The refractive index of glass is

`n\text{ = 2.2}`

To find the speed of light through the glass.

Step-by-step explanation:

The formula to calculate the speed of light through glass is

`v=(c)/(n)`

Here, c is the speed of light in a vacuum whose value is

`c=\text{ 3}*10^8\text{ m/s}`

On substituting the values, the speed of light through the glass will be

`\begin{gathered} v=(3*10^8)/(2.2) \\ =1.36\text{ }*10^8\text{ m/s} \end{gathered}`

Thus, the speed of light through glass is 1.36 x 10^(8) m/s