table of contents what “laser” stands for –acronymacronym definition of laserlaser some uses...

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)

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

Eye Cosmetic Tumor Removal

Hair Removal Tattoo Removal Birth Mark 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

Construction Welding

Cutting

Land Development Range Finding

Surveying

Entertainment CD Player

DVD Player

Sales/Retail Bar 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: 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