General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. Longitudinal or Transverse? 1.

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Presentation transcript:

General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. Longitudinal or Transverse? 1

General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. Parts of a Transverse Wave 2

General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. The Speed of Light American physicist, Albert Michelson proved that the speed of light was km/s or m/s. 3

General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. The 4 fundamental forces of nature…without it we would all fly apart 1)Strong 2)Weak 3)Electromagnetic 4)Gravitational 4

General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. The Electromagnetic Spectrum 5

General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. What does ‘Electromagnetic’ mean?  When an electric charge (usually in motion) produces a magnetic field….so electromagnetic means ‘relating to magnetism and electricity 6

General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. What does the word ‘Spectrum’ mean?  The word ' spectrum' (the plural of which is 'spectra') comes from a Latin word,spectare, which means 'to make a display out of something'spectrum 7

General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. A few important facts before we begin 1)All the waves on the EM spectrum travel at the same speed…the speed of light… m/s or km/s 8

General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. A few important facts before we begin 2) Each wave has a different wavelength 3) Each wave has a different frequency 9

General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. An EM presentation  excel/electromagnetic_spectrum/electromagneticspe ctrumact.shtml excel/electromagnetic_spectrum/electromagneticspe ctrumact.shtml  excel/electromagnetic_spectrum/electromagneticspe ctrumact.shtml excel/electromagnetic_spectrum/electromagneticspe ctrumact.shtml 10