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ICSE Class 10 Physics Question 11 of 25

Solved 2025 Question Paper ICSE Class 10 Physics — Question 1

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Question 4(i)

(a) Out of the three rays (I, J, H) shown in the diagram, which ray will suffer Total Internal Reflection while inside the prism? (Critical angle of the prism is 42°.)

Out of the three rays (I, J, H) shown in the diagram, which ray will suffer Total Internal Reflection while inside the prism? The body will : ICSE 2025 Physics Solved Question Paper.

(b) Copy the diagram to complete the path of the ray which you have named in (a) till it comes out of the prism.

Answer

(a)

Out of the three rays (I, J, H) shown in the diagram, which ray will suffer Total Internal Reflection while inside the prism? The body will : ICSE 2025 Physics Solved Question Paper.

From the above diagram, it is visible that inside the prism, the angles of incidence of rays I, J and H are respectively 30˚, 60˚ and 30˚. Hence only the ray J will suffer total internal reflection.

(b)

Copy the diagram to complete the path of the ray which you have named in (a) till it comes out of the prism. ICSE 2025 Physics Solved Question Paper.