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What is a. Laser?. LASER ?. TABLE OF CONTENTS. What “Laser” Stands for Acronym Definition of Laser Some Uses for Lasers Medical Organizational Chart Military Commercial . Georgia Performance Objectives. Fourth Grade Science current QCC Standards Inquiry 2
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What is a Laser? LASER ?
TABLE OF CONTENTS • What “Laser” Stands for • Acronym • Definition of Laser • Some Uses for Lasers • Medical • Organizational Chart • Military • Commercial
Georgia Performance Objectives • Fourth Grade Science current QCC Standards • Inquiry • 2 • Topic: Reference SkillsStandard: 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 ColorStandard: 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)
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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.
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 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 LaserURL:http://www.bell-labs.com/history/laser/Annotation: A history page from Bell Laboratories • Title: What Is a Laser?URL:http://www.bell-labs.com/history/laser/laser_def.htmlAnnotation: From the Bell Laboratories where the idea for the Laser began, this page provides history and an overview. • Title: StructureURL:http://www.chem4kids.com/files/atom_structure.htmlAnnotation: A good site for background in the structure of the atom. • Title: HoloworldURL:http://www.holoworld.com/holo/kids.htmlAnnotation: You can find a good illustration on this page. • Title: What's Cool About LasersURL:http://www.opticalres.com/kidoptx_f.html#LasersAnnotation: Find out more about lasers at this Web site. • Title:URL:http://www.thetech.org/exhibits/online/lasers/overview.htmlAnnotation: 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.doc • Annotation: Internet research form with room for students’ responses