Predicting Images in a Convex Lens

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13.1 Lenses. Predicting Images in a Convex Lens.

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Presentation transcript:

Predicting Images in a Convex Lens

The Principal rays A ray parallel to the principal axis is refracted through the principal focus (F ).

The Principal rays A ray through the optical centre (O) continues straight through without being refracted. 5

Ray diagram when the OBJECT is beyond 2F 6

Ray diagram when the OBJECT is AT 2F 7

Ray diagram when thE OBJECT is BETWEEN 2F and F 8

Ray diagram when the image is AT F 9

Ray diagram when the image is between F and O 10

http://www. physics-chemistry-interactive-flash-animation http://www.physics-chemistry-interactive-flash-animation.com/optics_interactive/converging_lens_convex_positive.htm 11

Predicting Images in a Concave Lens

Concave Lens Characteristic Rays Any incident ray parallel to the principal axis will refract as if it had passed through the principal Focus.

Concave Lens Characteristic Rays Any incident ray passing through the Optical Centre will pass undeviated (straight through).

Concave Lenses All Cases

Homework Pg. 561 #2, 3, 5, 6