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15 cards from this deck
Curved pieces of transparent material that bend light rays
Thicker in middle than at edges
Thinner in middle than at edges
Thicker in middle = converging; thinner = diverging
Central point where light passes through without bending
Line through optic centre, perpendicular to lens surface
Point where parallel rays converge or appear to diverge from
Distance from optic centre to principal focus
Brings them together at principal focus
Spreads them apart
Shorter focal length = greater converging/diverging power
Continues straight without bending
Bends through principal focus on far side
Emerges parallel to principal axis
Eyeglasses, cameras, telescopes, microscopes, binoculars
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