c) Refractive index
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Last updated 9:46 PM on 3/5/26
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4 Terms
1
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define refractive index
how strongly a material refracts light passing through it
→ the density of a material
2
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state the formula for refractive index
n = c/v
refractive index of a material = speed of light in a vacuum (ms-1) / speed of light in the material (ms-1)
3
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state the law of refraction
when light passes through a boundary
→ ratio of the sine of the angle of incidence to the sine of the angle of refraction = constant
4
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state the formula for the law of refraction
n1sinθ1 = n2sinθ2
refractive index of incident material × sine of the angle of incidence (°) = refractive index of refractive material × sine of the angle of refraction (°)
