lenses Flashcards

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1
Q

lenses

A

Acurved,transparentpiece of glass or plastic, designed torefract light.

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2
Q

convex lens

A

A lens thatcurves outwardsat the centre; in other words, it isthicker at the centre.

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3
Q

concave lens

A

A lens thatcurves inwardsat the centre; in other words, it isthinner at the centre.

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4
Q

gently curved lens

A

cause less refraction of light and therefore have alonger focal length.

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5
Q

strongly curved lens

A

cause greater refraction of light and therefore have ashorter focal length.

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6
Q

focal length in lenses

A

determined by itscurvature(how curved it is).

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