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A scuba diver below the water surface shines a beam of light up toward a person manning the transport boat.

What is the critical angle at which all light striking the water/air surface is reflected?

Created for Albert.io. Copyright 2016. All rights reserved.

A

${ 30 }^{ \circ }$

B

${ 41.25 }^{ \circ }$

C

${48.75 }^{ \circ }$

D

${ 22.08 }^{ \circ }$

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