37. 38. 39. 40. A student has focussed the image of an object of height 3 cm on a white screen using a concave mirror of focal length 12 cm. If the distance of the object from the mirror is 18 cm, find the values of the following: i. Distance of the image from the mirror ii. Height of the image Draw ray diagram in each of the following cases to show what happens after reflection to the incident ray when i. it is parallel to the principal axis and falling on a convex mirror. ii. it is falling on a concave mirror while passing through its principal focus. iii. it is coming oblique to the principal axis and falling on the pole of a convex mirror. Draw ray diagram showing the image formation by a concave mirror when an object placed between pole and focus of the mirror. Size of image of an object by a mirror having a focal length of 20cm is observed to be reduced to 1/3rd of its size. At what distance the object has been placed from the mirror? What is the nature of the image and the mirror?