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EXAM #2 THIS FRIDAY, 10/16 BRING PENCIL, CALCULATOR, AND SHEET OF NOTES (PUT YOUR A00 NUMBER ON IT) CHAPTER 4 OWL ASSIGNMENTS (& FIRST CHAPTER 6 ASSIGNMENT) DUE 10/15 Announcements
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Wave Review Amplitude Sound = Volume Visible Light = Brightness Wavelength or Frequency Sound = Pitch Visible Light = Color
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The Electromagnetic Spectrum How does electromagnetic (em) radiation affect molecules? Microwave IR Visible UV X-Rays
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Frequency ( ) & Wavelength ( ) Electromagnetic waves in vacuum all travel at c, the “speed of light” c= 2.998 x 10 8 m/sec Light acts like a wave (reflects, refracts, interferes, etc.) BUT…
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Energy is Quantized Light also acts like particles Photon= “Packet” of energy Energy is proportional to Frequency (and ) Planck’s Equation:
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UV-B Light and DNA Damage
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