railway RRB Group D Mock Test Series 2024-25 General Science Physics

A light ray is travelling from air medium to water medium (refractive index = 1.3) such that angle of incidence is x degree and angle of refraction is y degree. The value of ratio (sin y) / (sin x) is:

1
1/1.3 
2
1
3
1.3
4
0.3
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