Light travels through water and crosses a boundary at a non-normal angle into a different fluid with an unknown index of refraction. Which of the following is true about the path of the light after crossing the boundary? a. If the index of refraction of the fluid is higher than that of water, the light will speed up and turn toward the normal.  b. If the index of refraction of the fluid is higher than that of water, the light will slow down and turn away from the normal.  c. If the index of refraction of the fluid is lower than that of water, the light will speed up and turn away from the normal.  d. If the index of refraction of the fluid is lower than that of water, the light will slow down and turn toward the normal.

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A:

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Dispersion of White Light

Snell’s law is a formula that gives a relation between the angle of incidence and angle of refraction and is given as: