A laser light beam passes through water and oil as shown below. If the time taken by the laser to pass through water is t, then the time taken by the same light beam in oil would be _______.​

Q. A laser beam passes through the air into a piece of plexiglass. Find out the possible change in property of the laser beam

Q. A light beam is made to pass through two separate tissues A and B having refractive index 1.25 and 2 respectively. If the length of both the tissues are same and equal to 4 m. The ratio of time taken by the light beam travelling through the tissue B with respect to the tissue A is

Q. Among the options given below, which of the following exhibits the Tyndall effect?

(A) Sunlight passing through clouds
(B) Light beam passing through a glass of milk
(C) Light beam passing through a glass of water

Q.

A water, oil emulsion is a non-homogeneous mixture of water and oil, held together by an emulsifier (a substance that stabilizes an emulsion, in particular an additive used to stabilize processed foods) , like egg! If you shine a laser beam through a beaker of this emulsion, it will surely travel in a straight line.

Q. A ray of light passes through a glass plate of thickness $t$ and refractive index $\mu$. If the speed of light in vacuum is $c$, then the time taken by light in passing through the plate will be