The position of a real point object and its point image are as shown in the figure-. AB is the principal axis. This can be achieved by using :

A luminous point object is placed at O , whose image is formed at I as shown in the figure. AB is the optic axis. Which of the following statements are correct ?

A luminous point object is placed at O, whose image is formed at I as shown in Figure. Line AB is optical axis. Which of the following statement is // are correct?

A luminous point object is placed at O, whose image is formed at I as shown in Figure. Line AB is optical axis. Which of the following statement is // are correct?

In the figureshownm the image of a real object is formed at point I. AB is the principal axis of the mirror. The mirror must be

In the figureshownm the image of a real object is formed at point I. AB is the principal axis of the mirror. The mirror must be

A real image of a distant object is formed by a plano-convex lens of its principal axis. Spherical aberration

A real image of a distant object is formed by a plano-convex lens of its principal axis. Spherical aberration

A concave mirror forms a real image, on a screen of thrice the linear dimension of a real object placed on its principal axis. The mirror is moved by 10 cm along its principal axis and once again a sharp image of the object is obtained on the screen. This time the image is twice as large as the object. Find the focal length of the mirror.