CBSE Class 12 Physics 2016 Outside Delhi Set 1 Paper

Question : 7 of 26

Marks: +1, -0

A ray

P Q

incident normally on the refracting face

{\BA}

is refracted in the prism BAC made of material of refractive index 1.5. Complete the path of ray through the prism. From which face will the ray emerge? Justify your answer.

Solution:

Path of emergent ray
Naming the face
Justification

Face-AC
Here

i_c\;= sin \;^{-1} (\;{2}/{3})

\;= sin \;^{-1}(0.6)

∠ {\i}

on face

{\AC}

30^{∘}

which is less than

∠ {\i}_{ {\c}}

. Hence the ray get retracted here.

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