1. Welcome to Science 71 October 25, 2010 Day 39

2. Objective Waves on the Electromagnetic spectrum are related and organized based upon Wavelengths By the End of class- By the End of class- –Explain the Near-Infrared Goggles! –Explain Sunrises and Sets –Reviewed for Quiz –Bring Text Book To class tomorrow!

3. Agenda Quiz on Tuesday – Make-up Quiz on Tuesday – Make-up –Review –1 st part done solo, 2 nd in Groups Near Infrared Goggles Near Infrared Goggles –Finish the goggles and A5 worksheet B1 Sunset/Sunrise Explanation B1 Sunset/Sunrise Explanation Human Foot Print Video Human Foot Print Video

4. Bell Work #1 What letter represents the Amplitude of a wave? (U,V,W,X,Y,Z) X V U Z W

5. Bell Work #1 Please measure the wavelength (Lambda) of the wave below. AE D C BH G F I

6. Bell Work #1 What color has the longest wavelength? A. Violet B. Yellow C. Green D. Blue E. Red F. Orange G. Indigo

7. Bell Work Put these EM Wave types into order from Largest wavelength to Smallest wavelength. A. X-ray B. Visible LightC. Gamma D. RadioE. InfraredF. Microwaves G. Ultraviolet

8. Lesson

9. Bell Work What colors of light do you need to make white light? A. Green B. Yellow C. Blue D. Grey E. Red F. Not sure

10. Bell Work What type of Energy does the GHG in the atmosphere trap? A. Visible Light B. Thermal/Heat Energy C. Nuclear Energy D. None of the above

11. EM Spectrum-Energy One thing to remember, Electromagnetic Waves are made of two parts: One thing to remember, Electromagnetic Waves are made of two parts: Electric Fields Electric Fields Magnetic Fields Magnetic Fields Together, they make up the Radiant Energy-Solar Energy. Together, they make up the Radiant Energy-Solar Energy. In our Ovens this Radiant Energy is absorbed and converted into Thermal (HEAT) Energy-Infrared In our Ovens this Radiant Energy is absorbed and converted into Thermal (HEAT) Energy-Infrared Similar to Greenhouse/Earth Similar to Greenhouse/Earth

12. Take out your journal Please enter into the journal the following slides information Please enter into the journal the following slides information

13. EM Spectrum-Visible Visible Light Visible Light About 400-700nm About 400-700nm Makes up the spectrum to which we see most colors Makes up the spectrum to which we see most colors What you see is reflection What you see is reflection What you don’t see is absorption What you don’t see is absorption

14. EM Spectrum-Visible Red Red About 650nm About 650nm

15. EM Spectrum-Visible Orange Orange About 590nm About 590nm

16. EM Spectrum-Visible Yellow Yellow About 570nm About 570nm Yellow/Orange Parking lot light, emit 589 due to the Sodium that is placed in the bulb Yellow/Orange Parking lot light, emit 589 due to the Sodium that is placed in the bulb

17. EM Spectrum-Visible Green Green About 510nm About 510nm Grass Reflects Green, yet absorbs most other colors. Grass Reflects Green, yet absorbs most other colors. Good for Good forPhotosynthesisEspecially Blue and Red

18. EM Spectrum-Visible Blue Blue About 475nm About 475nm B/C Blue Waves are smaller in Wavelength, they are more easily Scattered by Atmosphere particles, causing the sky to be blue. B/C Blue Waves are smaller in Wavelength, they are more easily Scattered by Atmosphere particles, causing the sky to be blue. Water does a great job of absorbing Wave energy Water does a great job of absorbing Wave energy

19. EM Spectrum-Visible Indigo Indigo About 445nm About 445nm If you notice, above the last image, the sky appeared to get darker, like Indigo/Violet If you notice, above the last image, the sky appeared to get darker, like Indigo/Violet

20. EM Spectrum-Visible Violet Violet About 400nm About 400nm If you notice, above the last image, the sky appeared to get darker, like Indigo/Violet If you notice, above the last image, the sky appeared to get darker, like Indigo/Violet

21. EM Spectrum-Visible ROYGBIV ROYGBIV Red Red Orange Orange Yellow Yellow Green Green Blue Blue Indigo Indigo Violet Violet

22. Sun Rise/Set vs. Noon When the sun is rising or setting, the waves must travel through more atmosphere, and these particles slow down the waves. When the sun is rising or setting, the waves must travel through more atmosphere, and these particles slow down the waves. White  Yellow  Orange  Red/ Pink White  Yellow  Orange  Red/ Pink All Wavelengths  Large Wavelengths All Wavelengths  Large Wavelengths

23. Sun Rise/Set vs. Noon When the sun is at Noon, the waves must travel through less atmosphere, and these particles do not slow down the waves as much. When the sun is at Noon, the waves must travel through less atmosphere, and these particles do not slow down the waves as much. White  Yellow White  Yellow All Wavelengths  Medium Wavelengths All Wavelengths  Medium Wavelengths

24. Subject Connections SS-Cause & Effect Math-Variable Manipulation-Algebra LA-Autobiography Reading-Elevation and Light Waves Health-Skin Cancer and UV Music/Chorus-Vocal Waves-Instrument Waves

25. Bell Work How do you know that a plant is healthy? A. It reflects Green B. It reflects Blue C. It reflects Red How do you know it is stressed?

26. Bell Work What part of the EM Spectrum do these goggles let pass through? A. Visible B. Near-infrared C. UV D. Gamma

27. Bell Work Using the goggles, is this tree Healthy or Stressed? A. Healthy B. Stressed C. Not sure How do you know?

28. Using Electromagnetic Waves Humans have found ways of using the electromagnetic waves to heat things. Humans have found ways of using the electromagnetic waves to heat things.

29. Lesson B7 Engineering Design Process