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7 Cards in this Set
- Front
- Back
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Converging Lens (description) |
They are thicker in the middle than at the edges. |
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Diverging Lens (description) |
They are thinner in the middle than at the edges. |
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The Principal Axis |
An imaginary line joining the two centers of curvature. |
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Paraxial rays |
Rays close to the principal axis and very nearly parallel to it. |
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The principal focus (F) (converging) |
The point on the principal axis to which all paraxial rays converge after refraction through the lens. |
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The principal focus (F) (diverging) |
Th point on the principal axis which all paraxial rays appear to diverge after refraction through the lens. |
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Power of a lens (formula) |
Power = 1/focal length (m) |
