If the magnification of objective and eyepiece in a compound microscope is ' $m_o$ ' and ' $m_e$ ' respectively, then the total magnifying power $( m )$ of the microscope will be :
If the refractive index of denser medium 1 relative to rare medium 2 is $n_{12}$ and the critical angle for the pair of these mediums is $i_{ c }$, then the relationship between $n _{12}$ and $i_c$ is :
The focal lengths of the objective and eye lens of a microscope are 4 cm and 8 cm respectively, and the distance of the object from the eye lens is 4.5 cm ., then the magnifying power will be :
The focal lengths of the objective and eye lens of a microscope are 4 cm and 8 cm respectively and the distance of the object from the objective is 4.5 cm , then the magnifying power will be :
When a bi-convexo lens of glass with refractive index 1.47 is immersed in a liquid, then it behaves like a plane glass sheet, it means that the refractive index of the liquid is :
$\lambda$ ray of light passes through a prism of refractive index $\sqrt{2}$ in such a way that its angle of incidence is twice of the angle of refraction and there is minimum deviation in the ray. The angle of the prism will be :
A light ray incident on a surface of refractive index $n$, which is separating this medium from air. The angle of incidence is $45^{\circ}$. For what value of $n$ can this ray have total internal reflection?