# A point source S is placed at a height h from the bottom of a vessel of height H(lt h). The vessel is polished at the base. Water is polished at the

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A point source S is placed at a height h from the bottom of a vessel of height H(lt h). The vessel is polished at the base. Water is polished at the base. Water is gradually filled in the vessel at a constant rate alpha m^(3)//s. The distance d of image of the source after reflection from mirror from the bottom of the vessel varies with time t as

A.
B.
C.
D.

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