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2 cards from this section. Quick, good the night before a test.
Define the lens formula and what each term represents.
Think about how distances are measured in optics.
What does a positive magnification indicate?
Consider the orientation of images formed by different lenses.
What does the lens formula relate?
Recall the definition of the lens formula.
True or False: A concave lens can produce a real image.
Think about the behavior of light rays through different lenses.
An object is placed 20 cm from a convex lens with focal length 10 cm. Calculate the image position and explain.
Don't forget to use the correct signs for distances!
For a concave lens that produces an image at a distance of -5 cm when the object is at -10 cm, what is the focal length?
Focus on keeping signs straight according to conventions.
5 more questions in this section. Enroll free to practise them all.
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