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15 cards from this deck
Change in direction as light crosses boundary between media
Light travels at different speeds in different substances
Incident ray, normal, refracted ray all lie in same plane
Line perpendicular to surface at point of incidence
sinisinr=n\frac{\sin i}{\sin r} = nsinrsini=n
How much light slows down and bends entering a material
n=cvn = \frac{c}{v}n=vc where ccc = vacuum speed, vvv = medium speed
1.33
2.42
1.0003 ≈ 1
3×1083 \times 10^83×108 m/s
n12=n2n1n_{12} = \frac{n_2}{n_1}n12=n1n2
Bends toward the normal
Bends away from the normal
Slower light speed in that medium
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