Focal length of the convex lens shown in figure is `20cm.` Find the image position and image velocity.

Focal length of the mirror shown in figure is 20cm. Find the image position and its velocity.

Focal length of the mirror shown in figure is 20cm. Find the image position and its velocity.

Focal length of concave lens shown in figure is 60 cm. Find image position and its magnification.

Find focal length of the system as shown if figure. Find image position.

Find focal length of the system as shown if figure. Find image position.

Focal length of a convex lense in air is 20cm. and of concave lens 40cm. Find the position of final image.

Focal length of a convex lense in air is 20cm. and of concave lens 40cm. Find the position of final image.

An object is placed at a distance of 20 cm from a thin double convex lens of focal length 15 cm. Find the position and magnification of the image.