C.Light will be refracted away from a line drawn perpendicular to the point of refraction.
Explanation:
Refraction is a phenomenon that occurs when a light wave crosses the boundary between two mediums.
When this occurs, the light ray changes speed and direction, according to the Snell's Law:
[tex]n_1 sin \theta_1 = n_2 sin \theta_2[/tex]
where
[tex]n_1[/tex] is the index of refraction of the 1st medium
[tex]n_2[/tex] is the index of refraction of the 2nd medium
[tex]\theta_1[/tex] is the angle of incidence (the angle between the incident ray and the normal to the boundary)
[tex]\theta_2[/tex] is the angle of refraction (the angle between the refracted ray and the normal to the boundary)
The index of refraction of a medium is given by
[tex]n=\frac{c}{v}[/tex]
where
c is the speed of light in a vacuum
v is the speed of light in the medium
Rewriting Snell's law in terms of the speed of light in the mediums, we find therefore:
[tex]\frac{sin \theta_1}{v_1}=\frac{sin \theta_2}{v_2}[/tex]
which means
[tex]sin \theta_2 = \frac{sin \theta_1 v_2}{v_1}[/tex]
Here light passes from a slower medium to a faster medium, so
[tex]v_2 > v_1[/tex]
which implies that
[tex]\theta_2 > \theta_1[/tex]
So, the light ray bends away from the normal, therefore the correct option is
C.Light will be refracted away from a line drawn perpendicular to the point of refraction.
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