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31 internalReflection

31 internalReflection - Craig Ogilvie Craig Ogilvie 11...

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Unformatted text preview: Craig Ogilvie Craig Ogilvie 11 Summary of Lecture 30 § Light changes direction when it crosses a boundary § When going from high index to low index – refracted ray bends away from the normal § Problem-solving – Draw the normal to the interface – Label angles with respect to this normal – Label indexes of refraction, angles with same subscript – cross-check answer feasibility, » angles, positions make sense ) sin( ) sin( b b a a n n θ θ = Craig Ogilvie Craig Ogilvie 22 Goals for Today § Finish refraction from flat interface between two media – spearfishing – internal reflection § Understand image formation in spherical mirrors – image, rays of light diverge from common point Craig Ogilvie Craig Ogilvie 33 Question: Dispersion, 1st round § White light shone into a prism § Different wavelengths of color have different indexes of refraction in glass. 1. nred > nblue 2. nred < nblue 3. Insufficient info 1 of 300 Craig Ogilvie Craig Ogilvie 44 Question: Dispersion, 2nd round 0% 100% 0% 0% 100% 0% 1 2 3 § White light shone into a prism § Different wavelengths of color have different indexes of refraction in glass.Different wavelengths of color have different indexes of refraction in glass....
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31 internalReflection - Craig Ogilvie Craig Ogilvie 11...

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