Question

A student performs an experiment using a spherical lens. He placed the object far away from the lens. The image formed is inverted and is produced on a screen placed on the opposite side of the lens. Which lens is being used by the student for the experiment

Answer 1

Answer:

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Explanation:

To study the nature of the image, the lens is initially placed on a 'V' shaped stand and its focal length is determined by focusing the lens to an object at infinite distance. The points F

1

,2F

1

,F

2

and 2F

2

are marked on the paper and the lens is focused to the object at infinity, just behind 2F

1

, at 2F

1

, between F

1

and 2F

1

, at F

1

and between F

1

and optic center.In each case the position of the screen is adjusted and the nature of the image is studied.