The total internal reflection in a diamond makes it shine, because the critical angle of diamond is ………

The main principle behind working of optical fibres is …………

Choose the correct increasing order of substances water, ice, kerosene arranged based on their refractive index ………

If $n_{1}n\_1$ and $n_{2}n\_2$ be the refractive Indices of denser and rarer media respectively and c is the critical angle, then ………

A bunch of optical fibres causes a ……………

Refractive index of medium is directly proportional to ………

To see internal organs of the human body optical fibres are used in ………

If critical angle of the medium is 60°, then the velocity of light in that medium is ……..m/s

Relation between critical angles of water and glass is ………

The light ray that falls perpendicular to one side of the glass slab surface comes out…………

When a glass slab is introduced in the path of a light ray the number of times the light ray undergoes refraction are ………

Refractive index of the glass slab =

The lateral displacement depends on …………

The angle between emergent ray and normal is called ………

The perpendicular distance between the extended emergent ray and incident ray which are parallel is called