CHAPTER 16. OPTICAL PHENOMENA; PROPERTIES OF MATTER 16.5
Activity: Uses of lasers
Do research in a libraryor on the Internet on one application of laser tech-
nology. Explain how thetechnology works by using a laser.
You will need to present your findings to the class in the form of a poster. You
can think of any usefulapplication, but to giveyou some ideas of where to
start, some applicationsare listed below:- laser printers
- laser communication and fibre optics
- optical storage
- using lasers as precision measurement tools
- your own ideas...
Exercise 16 - 4
- Explain what is meant by spontaneous emission of radiation.
- Explain what is meant by stimulated emission ofradiation.
- List the similarities and differences betweenspontaneous emission of radiation
and stimulated emissionof radiation. - How is the light emitted by a laser different from the light emitted bya light bulb?
- Describe using a simple diagram, how a laser works. Your description should
include the following concepts: metastable stateand population inversion. - Give examples of some materials that havebeen used for lasers. What do all
these materials have in common? - Describe how the laser cavity affects:
- increasing amplification
- concentrating beam intensity
- narrowing the frequency of the beam
- List some applications of lasers.
More practice video solutions or help at http://www.everythingscience.co.za(1.) 01n1 (2.) 01n2 (3.) 01n3 (4.) 01n4 (5.) 01n5 (6.) 01n6
(7.) 01n7 (8.) 01n8