(i)Draw two rays from the point O of the object pin to show the formation of image I at O itself.

(ii)What is the size of the image I?

(iii)State two more characteristics of the image I.

(iv)Name the distance of the object O from the optical centre of the lens.

(v)To what point will the rays return if the mirror is moved away from the lens by a distance equal to the focal length of the lens?

Solution:

(ii) The image will have the same dimensions as the object.

(iii) The resulting image will be both real and inverted.

(iv) The focal length of the lens will be equal to the distance between object O and the optical lens.

(v) The position of the mirror from the lens has no effect on the generation of the image as long as the rays from the lens fall normally on the plane mirror M.