Does light pass through all the media at the same speed ?

Will total internal ,reflection take place when light passing through water is incident on the surface of separation with air at the angle of incidence of 45^@ ? Why ?

A certain volume of Ar gas require 45 sec to effuse through a hole at a certain pressure and temperature. The same volume of another gas of unknown molecular weight require 60 sec to pass through the same hole under the same condition of temperature and pressure. The molecular weight of gas is

If the light waves pass through a Nicol prism,then all the oscillation occur only in one plane,such beam of light is called as------

The path of light rays through a convex lens when it is placed in two different media is shown in the figure. What is the relation between the refractive indices mu, mu_1 and mu_2 ?

Consider the equation of all circles which pass through the origin and whose centres are on the x-axis. Define the general equation of the circle.

A ray of light passing through a prism. If the refracted ray QR is parallel to the base BC, as shown in figure:Draw a graph which shows the variation of d with i.