table of contents what “laser” stands for –acronymacronym definition of laserlaser some uses...
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TABLE OF CONTENTS
• What “Laser” Stands for – Acronym
• Definition of Laser
• Some Uses for Lasers– Medical
• Organizational Chart
– Military – Commercial
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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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MPLIFICATION BY
IGHT
TIMULATED
MISSION OF
ADIATION
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Definition of Laser
• A device that produces a focused beam of light at a defined wavelength that can vaporize tissue.
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Uses for Lasers
• Medical
• Military
• Commercial
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Medical Uses
• In surgery, lasers can be used to operate on small areas without damaging delicate surrounding tissue.
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Medical Uses
Surgery
Eye Cosmetic Tumor Removal
Hair Removal Tattoo Removal Birth Mark Removal
Brain Spinal Cord
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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
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Commercial Uses
Construction Welding
Cutting
Land Development Range Finding
Surveying
Entertainment CD Player
DVD Player
Sales/Retail Bar Code Scanners
Engraving
More Information and uses
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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.
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Helpful Resources• Title: Schawlow and Townes Invent the Laser
URL: 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