Question

You have a convex lens of focal length 12 cm. You place a

candle flame on its principal axis at a distance of 60 cm from

the lens on its one side and place a screen on its other side.

Write two characteristics of the image formed on the screen. If

you now shift the candle flame towards the lens so that its

distance from the lens becomes 15 cm, then state the changes

that are observed in these two characteristics of the image

formed.​

Answer 1

Answer:

A student focused the image of a candle flame on a white screen using a convex lens. He noted down the positions of the candle flame, screen and the lens as given below:

Position of the candle flame = 12.0cm

Position of the lens= 50.0 cm

Position of the screen=88.0 cm

(i) the focal length of the convex lens.

(ii) Find the position of the image of the candle flame if it is shifted towards the lens at a position of 31.0 cm.

(iii) State the nature of the image formed if the candle flame is further shifted towards the lens.

Explanation:

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