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4 cards from this section. Quick, good the night before a test.
What is the primary function of a convex lens?
Think about how a magnifying glass works.
What type of lens is used to correct nearsightedness?
Remember the shape of the lens!
What is a convex lens considered?
Think about how they gather light.
True or False: Concave lenses create real images.
Consider what happens when light passes through them.
If a convex lens produces a virtual image that is twice the size of the object, with the object located 10 cm from the lens, what is the lens' focal length?
Consider negative values for virtual images.
Two different concave lenses create an effective focal length of -30 cm when combined. If one lens has a focal length of -20 cm, what is the focal length of the other lens?
Remember to factor in the signs of the focal lengths when combining lenses.
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