A reflecting type telescope has a concave reflector of radius of curvature 120 cm.Calculate the focal length of eye-piece to secure a magnification of 20.

An object is placed 15 cm from a convex mirror of radius of curvature 90 cm.Calculate the image position and magnification.

Find the focal length of convex mirror whose radius of curvature is 32 cm.

An object is placed in front of concave mirror of radius of curvature 40 cm at a distance of 10cm. Find the position, nature and magnification.

An object is placed in front of a concave mirror of radius of curvature 40 cm at a distance of 10 cm.Find the position and magnification of the image.

The relation between the radius of curvature (R) and focal length (f) of a concave mirror is……

An object is placed in front of a concave mirror of radius of curvature 30 cm at a distance of10 cm.Find the position,nature and magnification fo the image.

A reflecting type telescope has a large spherical mirror for its objective with radus of curvature equal to 80 cm.What is the magnifying power of telescope,if eyepiece used has a focal length of 1.6 cm.