± Light Refracted through a Prism Part A Light is incident along the normal to f
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Question
± Light Refracted through a Prism Part A Light is incident along the normal to face AB of a glass prism of refractive index 1.70, as shown in the figure (Figure 1) such that no light is refracted out of the prism at face Find Omax , the largest value of the angle AC if the prism is immersed in air Express your answer in degrees. Ignore any reflections from the surface BC Hints amax:-54.0 degrees Submit My Answers Give Up Correct Figure 1 of 1 Part B Find alnax, the largest value the angle can have without any light being refracted out of the prism at face AC if the prism is immersed in water (with index of refraction 1.33) Express your answer in degrees. Ignore any reflections from the surface BC Hints Incident ray degrees Submit My Answers Give Up rovide Feedback ContinueExplanation / Answer
B)
For no light refracted at face AC , we must meet condition of total internal reflection at this face.
sin= n2/n1
Where n1=refractive index of medium containing , n2=refractive index of 2nd medium
Here n1=1.70 and n2=1.33
Plugging values,
=sin^-1[n2/n1]=sin^-1[1.33/1.70] = 51.5 deg
max = 90 - 51.5 = 38.5 deg
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