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15 cards from this deck
By refracting light
Thicker in middle than at edges
Converging lens
Point where light rays converge or appear to come from
Distance from lens centre to principal focus
Through the principal focus
Thicker at edges, thinner in centre
Diverging lens
Cause it to diverge (spread out)
Light comes together to form image on screen/retina
Only convex/converging lenses
Light rays diverge; object appears in different place
Concave/diverging lenses
Doesn't bend
Line perpendicular (90°90°90°) to the boundary
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