Chapter 8: Light

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Chapter 8 Light

• Reminder Light is transverse EM wave with
  oscillating electric and magnetic field (well
  concentrate on electric field)
• Wavelength tells spatial size of wave
• Frequency tells number of cycles per second
  (either tells color in the visible spectrum)
• High frequency high energy small fast

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Visible Light
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What you see is what you get?
Wavelength response of the human eye
The suns output
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Pinhole camera

• Light follows straight paths
• Smaller hole gives sharper, dimmer image

Safe way to view solar eclipse
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Lenses

• Lenses can focus (converging lens) or de-focus
  (diverging lens) light rays
• Can help gather more light for brighter image, or
  change size and location of image
• Light ray changes
• angle due to change
• in index and shape
• of lens

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Water can act like a lens
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Air can act like a lens
Superior mirage
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Eyes have lenses
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Dispersion and rainbows
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