While determining th refractive index of a liquid experimentally, he miroscope was focussed at the bottom of a beaker,when its reading was 3.965 cm.On pouring liquid upto a height of 2.537 cm inside the beaker ,the reading of the refocussed microscoe was 3.348 cm.Find the refractive index of the liquid.

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 .

What happens when a convex lens of refractive index 1.2 is immersed in a liquid of refractive index 1.3?

Calculate the index of refraction of a liquid from the following into glass: Reading for the bottom of an empty beaker:11.324 cm . Reading for the bottom of the beaker,when partially filled with the liquid:11.802 cm Reading for the upper level of the liquid in the beaker:12.895 cm.

The figure TBQ 9.38 shows an equiconvex lens (of refractive index 1.50) in contact with a liquid layer on top of a plane mirror. A small needle with its tip on the principal axis is moved along the axis until its inverted images if found at the positions of hte needle. The distance of the needle from the lens is measured to be 45.0 cm. The new distane is measured to be 30.0 cm. What is the refractive index of the liquid?

Explain what happens ,when a convex lens of refractive index 1.2 is immersed in a liquid of refractive index 1.3.

A glass convex lens has a power of +10 D.When ths lens is totally immersed in a liquid,it acts as concave lens of focal length 50cm.Calculate the refractive index of the liquid.Given ^a mu_g=1.5 .

A vessel ABCD of 10 cm width has two small slits S_(1) and S_(2) sealed with idebtical glass plates of equal thickness. The distance between the slits is 0.8 mm. POQ is the line perpendicular to the plane AB and passing through O, the middle point of S_(1) and S_(2) . A monochromatic light source is kept at S, 40 cm below P and 2 m from the vessel, to illuminate the slits as shown in the figure. Calculate the position of the central bright fringe on the other wall CD with respect of the line OQ. Now, a liquid is poured into the vessel and filled up to OQ. The central bright fringe is fiund to be at Q. Calculate the refractive index of the liquid.

Focal length of a convex lens of refractive index 1.5 is 2 cm.Focal length of lens,when immersed in a liquid of refractive index of 1.25 will be

A liquid of refractive index 1.5 is poured into a cylindrical jar of radius 20 cm upto a height of 20 cm.A small bulb is lighted at he centre of the bottom of the jar.Find the area of the liqud surface throug which the light of the bulb passes into air.