The Critical Angle for a Substance in Air Is Measured

question 55

Multiple Choice

The critical angle for a substance in air is measured at 53.7°.If light enters this substance from air at 45.0° with the normal,at what angle with the normal will it continue to travel?

• A)34.7°
• B)45.0°
• C)53.7°
• D)It will not continue,but will be totally reflected.

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