12/10/10

Post date: Dec 10, 2010 3:36:12 PM

• • Bell Ringer: Name 3 applications of lenses

  • Mirror and Lens Terminology

    • focal length (f) = the distance from the lens or mirror to the point where parallel incoming beams of light converge after striking the lens or mirror.

    • Center of curvature (C) = the point at the center of the imaginary sphere that the mirror was cut out of. C = 2f

    • Object distance (do) = the distance from the lens or mirror the the physical object

    • Image distance (di) = the distance from the lens or mirror to the screen where the image is projected

    • Object height (ho) = how tall the object is

    • Image height (hi) = how tall the image is

    • Types of mirror and lenses

      • Concave = the mirror or lens curves away from the object (like the object is looking into a very small cave)

      • Convex = the mirror or lens curves toward the object

    • Types of images

      • real = image is projected onto a screen

      • virtual = no image on screen, image is "inside" the mirror or lens

      • no image = no image on screen or "inside" the mirror or lens

      • inverted = upside-down

      • erect = right side up

  • Mirror and lens lab (due Tuesday next week)

    • Mirror part today, lens part tomorrow