Name the three special rays which are used to draw the ray diagrams for a spherical lens and trace its path.
Three rays are:
1. ray Parallel to the principle axis
2. Ray passing through the focus of the point
3. ray passing through the centre of the curvature.
1. ray Parallel to the principle axis
2. Ray passing through the focus of the point
3. ray passing through the centre of the curvature.