A container of uniform cross-section has a height of 14 m. Upto what height (in metre) water of refractive index `4//3` should be filled for normal viewing.

A vertical U-tube of uniform cross-section contains water upto a height to 0.8 m. Show. that if the water on one side is depressed and then released, its motion up and down the tube is shm. Calculate the period.

A pond of depth 20 cm is filled with water of refractive index 4//3 . Calculate apparent depth of the tank when viewed normally.

A vesserl contains a slab of glass 8cm thick and of refractive index 1.6 . Over the slab, the vessel is filled by oil of refractive index mu upto height 4.5 cm and then by another liquid, i.e., water of refractive index 4//3 and height 6cm as shown in Figure. An observer looking down from above observer that a mark at the bottom of glass slab appears to be raised up to a position 6cm from bottom of the slab. Find refractive index of oil (mu) .

A vesserl contains a slab of glass 8cm thick and of refractive index 1.6 . Over the slab, the vessel is filled by oil of refractive index mu upto height 4.5 cm and then by another liquid, i.e., water of refractive index 4//3 and height 6cm as shown in Figure. An observer looking down from above observer that a mark at the bottom of glass slab appears to be raised up to a position 6cm from bottom of the slab. Find refractive index of oil (mu) .

A cylindrical vessel of uniform cross-section contains liquid upto the height' H’ . At a depth H = H/2 below the free surface of the liquid there is an orifice. Using Bernoulli's theorem, find the velocity of efflux of liquid.

A rectangular glass block of thickness 10 cm and refractive index 1.5 is placed over a small coin.A beaker is filled with water of refractive index 4//3 to a height of 10 cm and is placed over a small block. Find the apparent position of jthe object,when it is viewed at normal incidence. .

Two liquid columns of same height 5m and densities rho and 2rho are filled in a container of uniform cross sectional area. Then ratio of force exerted by the liquid on upper half of the wall to lower half of the wall is.

Two liquid columns of same height 5m and densities rho and 2rho are filled in a container of uniform cross sectional area. Then ratio of force exerted by the liquid on upper half of the wall to lower half of the wall is.