A microscope is focussed on a coin lying at the bottom of a beaker. The microscope is now raised up by `1 cm`. To what depth should the water be poured into the beaker so that coin is again in focus ? (Refration index of water is `4//3`)

A mark is made on the bottom of beaker and a microscope is focussed on it. The microscope is raised through 1.5 cm . To what height water must be poured into the beaker to bring the mark again into focus ? Given that mu for water is 4//3 .

A mark is made at the bottom of a beaker and a microscope is focussed on it.the microscope is then raised through 0.015 m.To what height water must be poured into the beaker to bring the mark again into focus?Given a^mu_w = 4//3 .

A coin placed at the bottom of a beaker appears to be raised by 4.0 cm. If the refractive index of water is 4/3, find the depth of the water in the beaker.

A microscope is focussed on the scratch at the bottom of a beaker. Water is pured into it and the microscope is focussed again on the scratch at the bottom of the beaker. Some lycopodium power is sprinkled on the surface of water and microscope is focussed on to the powder. The corresponding readings are 1.17, 2.02 and 4.57 cm respectively, the refractive index of water is

A microscope is focussed on an ink mark on the top of a table. If we place a glass slab 3 cm thick on it, how should the microscope be moved to focus the ink spot again ? The refractive index of glass is 1.5