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2 cards from this section. Quick, good the night before a test.
What is refraction?
Think about what happens when you place a straw in water.
Define focal length.
What happens to light when it travels through a lens?
What happens to light when it enters a denser medium?
Think about how a straw looks when put into water.
What is the lens maker's formula used for?
Consider what information is needed to design a lens.
A lens is designed so that the ratio of its focal length to its radius of curvature is 1:5. Calculate the focal length if the radius is 10 cm.
Look at relationships given in lens maker's formula.
Using a lens with R1=20 cm and R2=-20 cm, find the focal length for a lens of n=1.5. Show all calculations.
Apply the lens maker's formula step by step to derive f.
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