Question

Rohan focused the image of a candle flame placed part 2 m from a convex lens of focal length 10 cm on a screen after that he gradually Moves the flame towards the lens at each time focuses its image on the screen in which direction does he move the lens to focus the flame on the screen with reason please​

Answer 1

the candle here is the object.....

so,as the candle is moved nearer to the lens the length of image from the lens would increase.so,in order to obtain clear image of the object,we must move the lens away from the candle.

Answer 2

In this case, he should move the screen away from the lens because as we move the object towards the lens the screen moves away gradually at every step and finally at infinity.

HOPE IT HELPS

ADIOS