TABLE OF CONTENTS What “Laser” Stands for –AcronymAcronym Definition of LaserLaser Some Uses for Lasers –MedicalMedical Organizational Chart –MilitaryMilitary –CommercialCommercial

Georgia Performance Objectives Fourth Grade Science current QCC Standards Inquiry 2 Topic: Reference Skills Standard: Uses encyclopedias, science reference magazines, books and other media to obtain information related to science concepts. Physical Science 22 Topic: Energy and Its Transformations: Light and Color Standard: Describes the technological procedures/devices that use light. Selects a topic and uses a variety of media resources to investigate selected topics (laser, optical fiber technology, or infrared devices)

MPLIFICATION BY IGHT TIMULATED MISSION OF ADIATION

Definition of Laser A device that produces a focused beam of light at a defined wavelength that can vaporize tissue.

Uses for Lasers Medical Military Commercial

Medical Uses In surgery, lasers can be used to operate on small areas without damaging delicate surrounding tissue.

Medical Uses Surgery EyeCosmetic Hair Removal Tattoo Removal Birth Mark Removal Tumor Removal Brain Spinal Cord

Military Uses The Saber 203 briefly illuminates an opponent with harmless, low-power laser light which temporarily makes the enemy unable to fight. Artillery Missiles Radar

Commercial Uses ConstructionWelding Cutting Land DevelopmentRange Finding Surveying EntertainmentCD Player DVD Player Sales/RetailBar Code Scanners Engraving More Information and uses

Questions/Activities 1. What does the acronym laser stand for? 2. Who invented the laser? 3. What happens to light to make it become a laser? 4. What are some real world uses of lasers? 5. What is your favorite fact about lasers? 6. If you wee to design a laser, what would you use it for? Describe what it would look like, how heavy it would be, how you would market/sell your product. 7. Which web site was your favorite? Why? 8. Do you think the laser is an important invention? Why or why not? 9. Draw a diagram of a laser based on the drawings and information on holoworld.com 10.After discussing the questions and the answers given, the students will give a ½ page summary on what they learned. The teacher will have the students play bingo based on the facts that they learned in the lesson.

Helpful Resources Title: Schawlow and Townes Invent the Laser URL: Annotation: A history page from Bell Laboratorieshttp:// Title: What Is a Laser? URL: Annotation: From the Bell Laboratories where the idea for the Laser began, this page provides history and an overview. Title: Structure URL: Annotation: A good site for background in the structure of the atom. Title: Holoworld URL: Annotation: You can find a good illustration on this page. Title: What's Cool About Lasers URL: Annotation: Find out more about lasers at this Web site. Title: URL: Annotation: An excellent overview of the Laser with a note on light and history. Applications of Laser technology are also included. Title: Laser Facts Tracker URL: attach What is a Laser Facts Tracker.docattach What is a Laser Facts Tracker.doc Annotation: Internet research form with room for students’ responses