Question

A fire fighter suit is bright and shiny why?

Answer 1

because it can be identified easily .
and uniform is always neccessary

Answer 2

As we know that, heat from fire to our body reaches through radiation and the silvery and shiny materials reflect back the radiated heat. So, that's the reason the fire suits are made up of silvery and shiny materials so that it does not harm the person dealing with the fire.