A glass beaker has diameter `4cm` wide at the bottom. An observer observes the edge of bottom when beaker is empty as shown in figure. When the beaker is completely filled with liquid of refractive index `n=sqrt(5//2)`, he can just see the centre of bottom, then the height of glass beaker is :

A person just observes the point A on the circumference at the bottom of an empty cylindricla vessel of diameter 10 cm . When the vessel is completely filled with a liquid (mu=sqrt2) , he can just see the centre B of the bottom. Then the height of the vessel is

A real image of an object is formed by a conex lens at the bottom of an empty beaker. The beaker is now filled with a liquid of refractive index 1.4 to a depth of 7 cm. In order to get the image again at the bottom the beaker shoud be moved

If an observer sees the bottom of the vessel shown in Figure., at 8cm, find the refractive index of the medium in which the observer is present.

If an observer sees the bottom of the vessel shown in Figure., at 8cm, find the refractive index of the medium in which the observer is present.

A shallow glass dish is 4.00 cm wide at the bottom as shown in figure. When an observer's eye is positioned as shown, the observer sees the edge of the bottom of the empty dish. When this dish is 4.00 cm wide at the bottom as shown in figure. When an observer's eye is positioned as shown, the observer sees the edge of the empty dish. When this dish is filled with water, the observer sees the centre of the bottom of the dish. Find the height of dish mu_w=4//3.

A person looking through a telescope T just sees the points on the rim at the bottom of a cylindrical vessel when the vessel is empty. When the vessel is completely filled with a liquid (mu, = 1.5) , he observes a mark at the centre B,of the bottom without moving the telescope or the vessel. What is the height of the vessel if the diameter of it scross section is 10cm.

An observer can see through a pin-hole the top end of a thin rod of height h, placed as shown in the figure. The height of beaker is 3h and its radius is h. When the beaker is filled with a liquid up to a height 2h , he can see the lower end of the rod. Then the refractive index of the liquid is