Archive
24th of March 2017
Physics
Q:

a student obtained a blurred image of a distant object using a convex lens.in order to obtain a sharp image of an object on a screen, he should move the lens

1)towars the screen

2) away from the screen'

3) either towards or away from the screen depending on the position of object

Sayon Ghosh - CBSE - Class X

Friday, March 24, 2017 at 17:32:PM

A:

Hi,

Correct option: (1)

When the object is at infinity, the distance of the image from the lens will be equal to the focal length of the lens.

Friday, March 24, 2017 at 18:19:PM