Any two sources of electric current

Complete question is;

Name any two sources of electric current

Generators

Electrolytic cells

Explanation:

There are two main sources of electric current namely using generators and also by use of Electrolytic cells.

Generators make use of mechanical energy like water flowing through a dam or even the motion of a steam driven turbine to supply adequate voltage that's necessary to generate an electric current while Electrolytic cells make use of chemical energy to supply adequate voltage that's necessary produce electricity.

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.