A small object is placed 50 m in front of a convex surface of radius 20 m. If the surface separates air from glass of refractive index 1.5, find the position and nature of the images.

An object is placed 21 cm in front of a concave mirror of radius of curvature 10 cm.A glass slab of thickness 3 cm and refractive index 1.5 is then placed close to the irror in the space between the object and mirror as shown in Fig.2.62.Find the position of the final image formed.You may take the distacne of the near surface of the slab from the mirror to be 1 cm. .

An object is placed 30 cm in front of a plano-convex lens with its spherical surface of radius of curvature 20 cm. If the refractive index of the material of the lens is 1.5, find the position and nature of the image formed.

An object is placed in front of a convex mirror of focal length 30 cm.If the image formed is a quarter of the size of the object,find the position of the image.

A small point object is placed in air at a distance of 60 cm from the convex spherical refracting surface of refractive index 1.5.If radius of curvatrure of the spherical surface is 25 cm,calculate the power of the refracting surface.

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.

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

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