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Wednesday, 25 June 2014 14:22

L7-31: PRINCIPAL PLANES

l7-31a

l7-31b

Additional Info

  • ID Code: L7-31
  • Purpose: Illustrate principal planes of a compound lens system.
  • Description: The cylinder in the photograph contains a 10 cm focal length convex lens and a 10 cm focal length concave lens separated by 5 cm, so the focal length of the system is 20 cm. Because the principal planes are both outside of the cylinder lens system and on the same side, the focal distances with the lens cylinder oriented in the two directions are considerably different. Form an image of the light on the screen with one end of the cylinder facing the light, then reverse the lens cylinder and move the cylinder to refocus.
  • Availability: Available
Read 646 times Last modified on Monday, 18 August 2014 14:17
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