Question

In an experiment to determine the focal length of a convex lens, a student obtained a sharp image of a grill of a window on a screen. To obtain the sharp image of a distant building instead of grill, on which direction should he move the lens

Answer 1

Answer:

According to me

Using a convex lens a student obtained a sharp image of the grill of a window in the

laboratory on a screen. For getting better result she focused a distant tree instead of the

grill. For getting a sharp image on the screen, in which direction should the lens be moved?

a) Away from the screen.

b) Towards the screen.

c) Behind the screen.

d) Very far away from the screen