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A ray of light strikes a glass-air boundary at an angle greater than the critical ...

A ray of light strikes a glass-air boundary at an angle greater than the critical angle. The ray will:
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  • A Pass into the air
  • B Travel along surface
  • C Reflect completely back
  • D Bend toward normal
Correct Answer: Option C
Explanation:
When the angle of incidence becomes greater than the critical angle, refraction stops completely. Instead, all the light reflects back into the glass. This phenomenon is called total internal reflection.

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