A spherical surface of radius 30 cm separates two transparent media A and B with refractive indices 1.33 and 1.48 respectively. The medium A is on the convex side of the surface. Where should a point object be placed in medium A so that the paraxial rays become parallel after refraction at the surface?
Spherical surface of Radius r= 30cm
Refractive indexes of two mediums are:
Medium B =
The medium A is on the convex side of the surface.
We know that;
Paraxial rays become parallel after refraction and the image is formed at infinity.
Therefore, image distance = v=
By using lens equation;
The object is placed at the distance of 266.0 cm from the convex surface on side A.