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A small bulb is placed at the bottom of a tank containing water to a depth of 80cm. What is the area of the bulb can emerge out? Refractive index of water is 1.33. (Consider the bulb to be a point source.)

A

`3.13 m^2`

B

`1.43 m^2`

C

`2.61 m^2`

D

`0.88 m^2`

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