Crown Shaped Lens
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 55mm Flower Crown Shape Lens Hood US $3.00
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 62mm Flower Crown Shape Lens Hood US $4.00
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A converging lens of a diamond and a lens of crown glass have the same shape?
Which lens will have the greater focal length? Explain your answer.
Index of refraction of diamond = 2.42
Index of refraction of crown glass = 1.52
Both are converging lenses.
You don't need to actually figure out the FLs, since this is a greater than/less than question. The lower index of refraction gives less convergence which results in a longer FL.
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