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Complete the path of the monochromatic l...

Complete the path of the monochromatic light ray AB incident on the surface PQ of the equilateral glass prism PQR till it emerges out of the prism due to refraction.

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AB `to` Incident Ray
BC `to` Refracted Ray
CD `to` Emergent Ray.
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ICSE-SAMPLE PAPER 2020-SECTION-II
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