Jump to content
Sign in to follow this  
  • entries
  • comments
  • views




What is a laser you may be asking yourself


Understandable, but I will tell you about them regardless

Laser is an acronym for Light Amplification by Stimulated Emission of Radiation.

There are many variations of lasers but all have the same core parts. Those Parts are a medium, two mirrors, and an energy source. Energy from the power source excites the electrons in the medium. The excited electrons produce photons of light. There are two mirrors facing each other in a laser. One of the mirrors is completely reflective, the other is only partially reflective. The photons bounce back and forth twixt the mirrors. As a photon hits one of the mirror, it splits and also helps stimulate other electrons. This is called the gain. Naturally however, energy is lost and not all the photons make it to the other mirror. This is called the loss. As long as the gain outnumbers the loss, photons will continue to go through the partially reflective mirror, and those photons is what you see coming out of the lasers.

There are many different kinds of mediums for lasers. There are dye lasers, gas lasers, crystal lasers and more.

Also, you can have a lot of fun with laser pointers and diffraction gratings. If I figured out how to post videos on here, I would put a video, but alas, I cannot, so I implore you to explore the mystical youtube in pursuit of cool laser videos. They aren't hard to find.


Recommended Comments

There are no comments to display.

Add a comment...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Terms of Use

The pages of APlusPhysics.com, Physics in Action podcasts, and other online media at this site are made available as a service to physics students, instructors, and others. Their use is encouraged and is free of charge. Teachers who wish to use materials either in a classroom demonstration format or as part of an interactive activity/lesson are granted permission (and encouraged) to do so. Linking to information on this site is allowed and encouraged, but content from APlusPhysics may not be made available elsewhere on the Internet without the author's written permission.

Copyright Notice

APlusPhysics.com, Silly Beagle Productions and Physics In Action materials are copyright protected and the author restricts their use to online usage through a live internet connection. Any downloading of files to other storage devices (hard drives, web servers, school servers, CDs, etc.) with the exception of Physics In Action podcast episodes is prohibited. The use of images, text and animations in other projects (including non-profit endeavors) is also prohibited. Requests for permission to use such material on other projects may be submitted in writing to info@aplusphysics.com. Licensing of the content of APlusPhysics.com for other uses may be considered in the future.

  • Create New...