| A | B |
|---|
| LASERS | Light Amplification by Stimulated Emission of Radiation |
| Laser Beam | A powerful beam of coherent light |
| Coherent | The light emitted from a laser is all the same wavelength |
| Lasing Medium | Can be a solid, liquid or gas. Atoms are pushed into an excited state by an energy source like electricity. |
| Photon | A single unit of energy. These are released after the atoms have absorbed energy. |
| Laser Light | Always one color and highly focused |
| Holograms | 3D looking images used in LASIK surgery, barcode scanning devices, etc |
| Mirrors | placed at both ends of the laser and used to bounce photons back and forth |
