ICSE Class 10 Physics 2018 Solved Paper

Question : 19

Total: 78

The following diagram shows a 60∘,30∘,90∘ glass prism of critical angle 42∘. Copy the diagram and complete the path of incident ray AB emerging out of the prism marking the angle of incidence on each surface.

Solution:

For refracting surface YZ,∠i=0∘

For refracting surface XZ,∠i=30∘
Since ∠i<∠ic,∴ the ray bends away from the normal.

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