The first step to getting output from a laser is to excite an active medium. What is this process called?

A. Pumping

B. Exciting

C. Priming

D. Raising

Answer: Option A

Solution(By Examveda Team)

A collection of atoms or molecules that can be excited to a higher energy state is called an active medium. Before lasing can occur, the active media is "pumped". The process of raising the atoms in the active media from a lower energy state to a higher state is like pumping water up from a well.