Q. 33

# A container conta

(i)Height of water container h= 20 cm

Ceiling of the room is 2.0 m above the water surface.

Radius of the rubber ring= r

Refractive index of water

From the figure we can say that;

By applying Snell’s law, we get;

From the figure, we get;

So,

(b)For Maximum angle of refraction, angle of incidence should be equal to critical angle i.e.

Let R is the maximum radius.

Now,

.

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