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Unit 3 Seminar

Unit 3 Seminar. Microwaves and Infrared. Grandma Needs Help.

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Unit 3 Seminar

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  1. Unit 3 Seminar Microwaves and Infrared

  2. Grandma Needs Help • Your Grandma Pauline has just won a microwave oven in a radio contest. When it arrives at her house, it sits on her counter, unused, for a month. One afternoon, when you visit her, she tells you that she is afraid to use it because "If I stand too close, I'll get radiated!" Explain to your Grandma the difference between the waves that are used in a microwave oven and the dangerous nuclear radiation she fears.

  3. Grandma says, “That cat looks funny!” • Use this spooky infrared picture of a cat: to give some proof to Grandma Pauline that a cat's nose is always cold. • http://science.hq.nasa.gov/kids/imagers/ems/ircat.gif

  4. Your Body in Infrared • If you took a similar • infrared photo of your • body, what parts would • you expect to show • up as brightest orange? • What parts would be blue?

  5. Other Uses for Infrared? • Can you think of other uses for infrared?

  6. Infrared Study • Click on the link, review the study. • Do you think this is a good use of infrared waves? • Other thoughts? http://www.sciencedaily.com/releases/2009/02/090210092730.htm

  7. New Infrared Technology • Raytheon just developed the world’s largest infrared light wave detector. What is this technology useful for? http://raytheon.mediaroom.com/index.php?s=43&item=1355

  8. Radio Waves vs. Microwaves • After Grandma Pauline starts thinking about electromagnetic waves, she asks you to explain why, if radio waves and microwaves are both electromagnetic waves, you believe she can’t listen to KROQ- FM on her new oven.

  9. Have a great week!Thank you for attending!

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