Question

which is optically denser water or air explain the reason

Answer 1

water is optically denser as compared to air

Answer 2

water is more optically denser than air t can explain by the phenomina of total internal reflection as angle of incidence in the denser medium is greater than the critical angle the incident ra does not refract into rarer medium but it reflected back.                                                                                                         The critical angle for water-air interfaces 49*