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ICSE Class 10 Physics 2018 Solved Paper

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A ray of light XY passes through a right angled isosceles prism as shown below.
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Question : 46
Total: 78
What is the angle through which the incident ray deviates and emerges out of the prism?
Solution:  
The angle through which the incident ray deviates and emerges out of the prism is 90∘.
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