Light,%20Mirrors,%20and%20Lenses

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Light, Mirrors, and Lenses

• O 4.3 Refraction and Lenses

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Refraction and Lenses

• Matter slows down light waves.
• The greater the density of matter, the slower the
  wave will travel.
• Speed of light is 300 million m/s
• The larger the change in speed the more the wave
  will refract.

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Refraction and Lenses

• Lens transparent object with a curved surface
  that bends light
• Convex lens thicker in the center than at the
  ends. ()
• Concave lens thicker at the ends than at the
  center )(

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Convex lens magnifies
Concave lens demagnifies
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Refraction and Lenses

• Concave and convex lenses act oppositely from
  mirrors
• Convex lenses create a focal point
• Concave lenses diverge light waves

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Farsighted Eyes
Near Sighted Eyes
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