Select Physics Topics

NOTICE: IN 2015 this site will get a complete makeover.  You will have to go to science-ebooks.com directly in order to see new directory.  

 

  

   Site Linker  Click Here!  Site Linker connects you to all seven of my eBooks and almost 200 of my reference sites using a single menu.  

Contents

Cover

TOC(Table of Contents)

Topic 1

Topic 2

Topic 3

Topic 4

Topic 5

Topic 6

Topic 7

Topic 8

Topic 9

Topic 10

Topic 11

Topic 12

Topic 13

 

 

Topic 9

Lasers


Source: Click Here

 

 

 

"The word "laser" stands for "light amplification by stimulated emission of radiation." Lasers are possible because of the way light interacts with electrons. Electrons exist at specific energy levels or states characteristic of that particular atom or molecule. The energy levels can be imagined as rings or orbits around a nucleus. Electrons in outer rings are at higher energy levels than those in inner rings. Electrons can be bumped up to higher energy levels by the injection of energy-for example, by a flash of light. When an electron drops from an outer to an inner level, "excess" energy is given off as light. The wavelength or color of the emitted light is precisely related to the amount of energy released. Depending on the particular lasing material being used, specific wavelengths of light are absorbed (to energize or excite the electrons) and specific wavelengths are emitted (when the electrons fall back to their initial level)." Qoute from site."

 

 

The "Laser Adventure " by Rami ARIELI
Great Site with animation.
Covers Electromagnetic Radiation as well as lasers

 


Site linker 40,70&67
Note red numbers, then go to Site Linker.

 

 

Educational 
Products
______________


_______________

  Graphic Lab Manual 
. Details 

 

 

NOTICE: IN 2015 this site will get a complete makeover.  You will have to go to science-ebooks.com directly in order to see new directory.  

 

 

 

 

 

 

Email comments to: BilPat4342@AOL.com