Which Way Does a Light Ray Bend When It Crosses

Which way does a light ray bend when it crosses the plane,smooth surface of a dense,transparent material (from air or a vacuum) at an angle to the perpendicular?

A) The light ray does not bend at all because the material is transparent.
B) The light ray bends toward the perpendicular.
C) The light ray always bends so that it travels perpendicular to the surface.
D) The light ray bends away from the perpendicular.

Correct Answer:

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