Study the ray diagram given below and answer the following Question s: i. State the type of lens used in the figure. ii. List two properties of the image formed. iii. In which position of the object will the magnification be-1? OR A student obtains a blurred image of an object on a screen by using a concave mirror. In order to obtain a sharp image on the screen, in which direction he will have to shift the mirror?

Question

Philoid · Accepted Answer

i. The type of the lens used in the figure is a convex lens.

ii. The image is real, inverted and magnified.

iii. When the object is placed at the twice distance of focal length then the magnification produced is -1.

OR

When obtaining an image of an object (if the object is distant), in order to get a sharp image, the mirror should be moved towards the screen in order to get a sharp image. This is so because as the mirror is brought near to the screen, the screen comes near the focus of the mirror thus a sharp image is obtained.