b. A laser is a source of light. Light is a form of energy. Light is called radiant
energy because it flows, or radiates, out from its source.
Figure 2-7. Radiant energy.
c. Amplification means to expand something--to make it bigger or stronger.
Turning up the volume on the radio makes the sound louder; the sound has been
amplified. In regard to a laser, amplification means making the light brighter.
Figure 2-8. Amplification.