Embibe Experts Solutions for Chapter: Wave Optics, Exercise 6: Exercise (Conceptual Questions)

The colour are characterised by which of following character of light-

When a thin transparent plate of thickness $t$ and refractive index $\mu$ is placed in the path of one of the two interfering waves of light, then the path difference changes by

In an interference experiment, third bright fringe is obtained at a point on the screen with a light $700 \mathrm{nm}$. What should be the wavelength of the light source in order to obtain $5\mathrm{th}$ bright fringe at the same point? 

A polariser is used to

The angle of polarization for any medium is $60°$. What will be the critical angle for this?

When the angle of incidence on a material is $60°$, the reflected light is completely polarized. The velocity of the refracted ray inside the material is (in ${\mathrm{ms}}^{-1}$ )

A polaroid is placed at $45°$ to an incoming light of intensity $I_0.$ Now the intensity of light passing through polaroid after polarisation would be

Plane polarised light is passed through a polaroid. On viewing through the polaroid we find that when the polariod is given one complete rotation about the direction of the light one of the following is observed