21.
a. _________________________________________.
b. _________________________________________.
c.
_________________________________________.
d. _________________________________________.
22.
The first letter of five words is combined to make up the word LASER. List those
five words.
a. L__________
b. A__________
c.
S__________
d. E__________
e. R__________
23.
Fundamentally, a laser is ___________ energy stored under pressure; when the
pressure becomes strong enough, the energy bursts forth in a ______________.
24.
List three uses of laser radiation discussed in this lesson.
a. _________________________________________.
b. _________________________________________.
c.
_________________________________________.
25.
Two laser devices are being used more and more in the US; these devices are
the Point of Sale device used by the checker at the supermarket and the
_____________________ system.
MD0587
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