Question

For refraction at a curved surface; the u.v relationship is:
$\frac{{\mu }_2}{v}-\frac{{\mu }_1}{u}=\frac{{\mu }_2-{\mu }_1}{R}$

• A. ${\mu }_2$: Refractive index of the medium of refracted ray
• B. ${\mu }_1$: Refractive index of the medium of incident ray
• C. R: Radius of curvature of the refractive surface.
• D. R is always positive

Answer 1

Answer: (A), (B), (C)

The correct options are
A ${\mu }_2$: Refractive index of the medium of refracted ray
B ${\mu }_1$: Refractive index of the medium of incident ray
C R: Radius of curvature of the refractive surface.

We can see from the diagram that ${\mu }_2$ is the refractive index of the medium in which the refraction takes place and ${\mu }_1$ is the refractive index of the medium, from where the light is incident on the surface.
R is the radius of curvature of the refracting surface. It is positive for a convex surface and negative for a concave surface.