The distance between the focal point and optic centre is called …………

The refracted rays of a parallel beam of light when they are incident on a lens …………

The ray passing through the ……… of the lens is not deviated.

Which of the ray does not deviate while passing through the lens ?

The rays which are travelling parallel to the principal axis of a convex lens:

The refracted rays ………. when they are pass through the focus of a lens.

What happens when parallel rays of light fall on a lens making some angle with the principal axis ?

The plane perpendicular to the principal axis at the focus is called ………

What type of rays fall on the lens when the object is placed at infinity ?

Which one of the following materials cannot be used to make a lens ?

For a concave lens when object is placed at infinity then the position of the image is …………

For a convex lens when object is placed beyond $C_{2}C\_2$ then the position of the image is …………

For a convex lens when object is placed between $C_{2}C\_2$ and $F_{2}F\_2$ then the position of the image is

For a convex lens when object is placed at $F_{2}F\_2$ then the position of the image is

For a convex lens when object is placed between focal point and optic centre then the position of the image is ………