Question

A beam of light from a laser illuminates a glass how long will a short pulse of light beam take to travel the length of the glass.

Answer 1

The time of short pulse of light beam is
`2.37*10^(-9)\ sec`

Step-by-step explanation:

Given that,

A beam of light from a laser illuminates a glass.

Suppose, the length of piece is
`L=25.21*10^(-2)\ m`

Index of refraction is 2.83.

We need to calculate the speed of light pulse in glass

Using formula of speed

`v=(c)/(\mu)`

Put the value into the formula

`v=(3*10^(8))/(2.83)`

`v=1.06*10^(8)\ m/s`

We need to calculate the time of short pulse of light beam

Using formula of velocity

`v=(d)/(t)`

`t=(d)/(v)`

Put the value into the formula

`t=(25.21*10^(-2))/(1.06*10^(8))`

`t=2.37*10^(-9)\ sec`

Hence, The time of short pulse of light beam is
`2.37*10^(-9)\ sec`