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Light waves and their properties

  1. Feb 24, 2014 #1
    Does light intensity and brightness depend on amplitude?
  2. jcsd
  3. Feb 24, 2014 #2
    Yes, brightness of light and its intensity depend on light wave amplitude, or the height of light waves. Brightness is also somewhat influenced by wavelength.
  4. Feb 24, 2014 #3
    Thanks! Is there any detailed explanation on that? Thanks in advance!
  5. Feb 24, 2014 #4
    Light waves (in general)

    1-How does the amplitude affects the brightness and intensity of light waves?

    2-And why energy affects the frequency of light waves rather than their amplitude; why doesn't the amplitude increase or decrease when extra or less energy is transferred by the wave instead of the frequency?

    Thanks in advance!
  6. Feb 24, 2014 #5
    1 - Brightness or Intensity are proportional to the square of Amplitude.
    2 - You're confusing the energy of individual photons (which is proportional to the frequency) with the total energy of the wave (which is proportional to the square of the amplitude of the wave)
  7. Mar 1, 2014 #6
    How do polarizers polarize light? Are the molecules arranged in a shape the the slits between them are parallel or perpendicular to the electric field of light? If they're perpendicularly arranged, how would light be polarized? ImageUploadedByPhysics Forums1393673276.910449.jpg
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