Physics
Two waves of the same pitch have amplitudes in the ratio 1:3. What will be the ratio of their:
(i) intensities and
(ii) frequencies?
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![The diagram below shows a light source P embedded in a rectangular glass block ABCD of critical angle 42°. Complete the path of the ray PQ till it emerges out of the block. [Write necessary angles.] ICSE 2019 Physics Solved Question Paper.](https://cdn1.knowledgeboat.com/img/abp10/5/icse-2019-physics-question-paper-solved-2e-1200x730.png)