Column I (optical system )

Column II (focal length )
`(P) 80 "cm" " " (Q) 40 "cm" " " (R) 30"cm" " " (S) 20"cm"`

An optical system consists of two convergent lenses with focal length f_1=20 cm and f_2=10 cm. The distance between the lenses is d=30 cm. An object is placed at a distance of 30 cm from the first lens. At what distance from the second lens will the images be obtained ?

An optical system consists of two convergent lenses with focal length f_1=20 cm and f_2=10 cm. The distance between the lenses is d=30 cm. An object is placed at a distance of 30 cm from the first lens. At what distance from the second lens will the images be obtained ?

An optical system consists of a thin convex lens of focal length 30 cm and a plane mirror placed 15 cm behind the lens. An object is placed 15 cm in front of the lens. The distance of the final image from the object is

An optical system consists of a thin convex lens of focal length 30 cm and a plane mirror placed 15 cm behind the lens. An object is placed 15 cm in front of the lens. The distance of the final image from the object is

Determine the position of the image produced by an optical system consisting of a concave mirror with a focal length of 10 cm and a convergent lens with a focal length of 20 cm. The distance from the mirror to the lens is 30 cm and from the lens to the object is 40 cm. Consider only two steps. Plot the image.

Determine the position of the image produced by an optical system consisting of a concave mirror with a focal length of 10 cm and a convergent lens with a focal length of 20 cm. The distance from the mirror to the lens is 30 cm and from the lens to the object is 40 cm. Consider only two steps. Plot the image.

In an optical instrument, a convex lens of focal length 20 cm is used in combination with a concave lens of focal length 40 cm. What is the power of this combination?

Arrange the following combinations in the increasing order of focal length Two piano convex lenses of focal lengths 15 cm and 30 cm in contact Two convex lens of focal lengths 40 cm and 50 cm in contact Two convex lenses of focal length 20 cm separated by 5 cm

Arrange the following combinations in the increasing order of focal length a) Two piano convex lenses of focal lengths 20 cm and 30 cm in contact b) Two convex lens of focal lengths 20 cm and 10 cm in contact Two convex lenses of focal length 25 cm separated by 5 cm.