If a light ray, incident normally on two glass media such that the time taken to pass through the first slab is t1 and through the second slab is $t_2$, then find the value of $t_1/t_2$.

Q. A monochromatic light passes through a glass slab $(\mu =\frac{3}{2})$ a thickness $90cm$ in time $t_1$. If it takes $t_2$ to travel the same distance through water $(\mu =\frac{4}{3})$. The value of $(t_1-t_2)$ is :

Q. A ray of light is incident normally on a glass slab of thickness $5$ cm and refractive index $1.6$. The time taken to travel by a ray from source to surface of slab is same as to travel through glass slab. The distance of source from the surface is :

Q. Two light rays of different wavelengths ${\lambda }_1$ and ${\lambda }_2$ fall respectively, on two glass slabs $S_1$ and $S_2$ normally and come out of the glass slabs simultaneously. If ${\lambda }_1>{\lambda }_2$ and if $t_1$ and $t_2$ are the thickness of the glass slabs $S_1$ and $S_2$ respectively, which among the following is the correct relation between them?

Q. A beam of monochromatic light passes through two glass slabs of the same geometrical thickness at normal incidence. The refractive index of the first slab is 1.5 and that of the second. 2.0. The ratio of the time of passage of the beam throw, the first to the second slab is