Question

A student finds out that the
sharp image of the window pane of her science laboratory is formed at distance of 15 cm from the lens. She now tries to focus the building visible to her outside the window instead of the window pane without disturbing the lens. In which direction she should now move the screen to obtain a sharp image of the building? What is the approximate the focal
length of this lens?​

Answer 1

Answer:

As the distance between viewer and the object increases, image sharpness decreases. So, Sudha should try to move the screen towards the lens to obtain sharp image of the buildings.

The approximate focal length is 15cm

Explanation:

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