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Unformatted text preview: Total Internal Reflection of Light – a phenomenon that occurs when light travels from a more optically dense to a less optically dense medium and the refracted angle is ° 90 and this causes the incident ray to be reflected back into the more dense medium =-θc sin 1n2n1 Eye Defects 1. Far sightedness (Hyperopia/presbyopia) – eyeball too short – converging lens fixes problem 2. Near sightedness (Myopia) – eyeball too long – diverging lens fixes problem 3. Astigmatism – out of round cornea or lens – cylinder fixes problem Convex Concave Object between F and 2F – Real, larger, inverted Object at 2F – Real, same size, inverted Object beyond 2F – real, smaller, inverted Object within F – virtual, larger, upright, behind object Virtual, upright, smaller Refractive Power in Diopters = = + P 1fdiopters 1do 1di If di is negative, then the image is virtual If magnification is negative, then the image is inverted...
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- Spring '10
- Light, Total internal reflection, optically dense medium