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3 cards from this section. Quick, good the night before a test.
What is the definition of magnification?
Think about how we compare the size of an image to the original object.
What type of lens always produces a diminished, virtual image?
Remember which lens diverges the light rays.
What is the formula for magnification?
Think about how we express the size relationship.
A concave lens always produces which type of image?
Recall the nature of how concave lenses work.
A convex lens has a focal length of 20 cm. Calculate the image position and magnification when an object is placed 60 cm from the lens.
Apply the lens formula and think about the implications of the distance.
If an object is placed 12 cm from a concave lens with a focal length of -8 cm, find the image distance and characteristics of the image.
Use the convention for concave lenses and remember its given focal length.
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