Information Technology Question: Download Questions PDF
What is the first step to getting output from a laser is to excite an active medium. What is this process called?
Answer:
Pumping.
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.
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.
Download Information Technology Interview Questions And Answers
PDF
| Previous Question | Next Question |
| What frequency range is the High Frequency band? | Which motor is NOT suitable for use as a DC machine? |