Apple QuickTime movie | 1996-06-03 | 1.2 MB | 240x180 | 10fps | 1 minute, 10 seconds
Transcription: At the core of the ruby laser is a bar of synthetic ruby. At each end of the bar is a mirror, one of which is transparent enough to allow light to pass. Coiled around the bar is a flash lamp. Ordinary light is incoherent with many wavelengths moving in different directions. A laser generates coherent light, which means its waves move in unison at the same wavelength, a light of singular intensity and power. How coherent light is produced begins at the atomic level When light is flashed into a ruby rod, it stimulates the ruby's atoms, sending its electrons to a higher energy level. As the light ...
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