A ball is kept at a height h above the surface of a heavy transparent sphere made of a material of refractive index mu. The radius of the sphere is R. At t=0 the ball is dropped to fall normally on the sphere. For t lt sqrt((2h)/g) and by a single refraction, what is the speed of image as a function of time?

A ball is kept at a height h above the surface of a heavy transparent

1.	A ball is kept at a height h above the surface of a heavy transparent sphere made of a material of refractive index mu. The radius of the sphere is R. At t=0 the ball is dropped to fall normally on the sphere. For t lt sqrt((2h)/g) and by a single refraction, what is the speed of image as a function of time?
Answer» `(MUR^(2)"GT")/([(mu-1)(h-1/2"gt"^(2))-R]^(2))` `[(muR^(2)"gt")/((mu-1)(h-1/2"gt")^(2))]` `(muR^(2)"gt")/((mu-1)(h-1/2"gt"^(2))-R)` `(muR^(2)"gt")/(mu(h-1/2"gt"^(2)))` Answer :A

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