Answer :
When light enters air from water, the angle of refraction will be greater than the angle of incidence and is denoted as option B.
What is Angle of refraction?
This is defined as the angle between a refracted ray and the normal to a refracting surface. Since light entered air from water, the water has the incident ray while the air has the refracted part.
According to Snell's law: n1sinθ1 = n2sinθ2
Refractive index of water = 1.333
Refractive index of air = 1.000293
Since air is denser than water, the angle of refraction will be greater than incidence because most refraction occurs for the transmission of light across a water-air boundary
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