A concave mirror of focal length 8cm produces a real image of size 4cm when an object 2cm high is placed at a certain distance from the mirror . Find the position of the image and the object.

An object is placed at a distance of 10cm from a convex mirror of focal length 15cm. Find the position and nature of the image.

Lenses of power 3D and - 5D are combined to from a compound lens. An object is placed at a distance of 50 cm from this lens. Find the position of its image ?

An object is kept at 0.2 m from a convex lens of focal length 0.15 m. Find the position of the image formed.

An object is placed at a distance of 50 cm from a concave lens of focal length 20 cm. Find the nature and position of the image.

We wish to obtain an erect image of an object, using a concave mirror of focal length 15cm. What should be the range of distance of the object from the mirror? What is the nature of the image? Is the image larger or smaller than the object? Draw a ray diagram to show the image formation in this case.