By what name is the angle incidence (in the denser medium) called whose corresponding angle of refraction (in the rarer medium) is equal to 90°?
By what name is the angle incidence (in the denser medium) called whose corresponding angle of refraction (in the rarer medium) is equal to 90°?
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⇒The critical angle for light moving from glass to air is 42°, and that of water to air is 48,8°.
Answer:
It is called by the name critical angle .