W3 Thin Lenses

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4 Terms

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Why do we ignore the refractive index in thin lenses?

Because the thickness is so small

2
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What are features of concave lens?

Negative power, adds divergence, secondary focal point is on the left

<p>Negative power, adds divergence, secondary focal point is on the left</p>
3
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What are features of convex lens?

Positive power, adds convergence, secondary focal point is on the right

<p>Positive power, adds convergence, secondary focal point is on the right</p>
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What does the focal point represent?

Where light will focus if it approaches with 0 vergence (at infinity)