Question

A student focused the image of a candle flame on a white screen using a convex lens.He noted down the position of the candle,screen and the lens as under, Position of candle=12.0 cm Position of convex lens=50.0 cm Position of screen=88.0 cm a)What is the focal length of the convex lens? b)Where will the image be formed if he shifts the candle towards the lens at a position of 31.0 cm?







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Answer 1

Answer:

(ii) If the student shifts the candle towards the lens at a position of 31.0 cm, object distance u=(50 -31) =19cm. Thus, candle lies at the focus. Hence, image will be formed at infinity. ... Thus a virtual, erect and magnified image is formed on the same side as the object.

Explanation:

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