Logic Medium
June 5th, 2010
Light travels from medium Y to medium X. The angle of refraction is larger than the angle of incidence.?
In which medium does the light travel at a lower speed? Explain your logic.
Please urgent!!
Let:
i be the angle of incidence in medium Y,
r be the angle of refraction in medium X,
vy be the velocity of light in medium Y,
vx be the velocity in medium X.
sin(i) / sin(r) = vy / vx (Snell’s Law).
As r > i, it follows that sin(r) > sin(i), as the sine function increases as angles increase from 0 to 90deg.
Therefore vx > vy.
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