When Light in Air or a Vacuum Enters the Plane

question 161

Multiple Choice

When light in air or a vacuum enters the plane surface of a dense, transparent medium at an angle to the perpendicular to this surface, which way does the light ray bend?

• A) The light ray bends away from the perpendicular.
• B) The light ray does not bend at all because the material is transparent.
• C) The light ray bends toward the perpendicular.
• D) The light ray bends so that, whatever the incoming angle, the light travels along the perpendicular to the surface.

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