Question

Rohit focused the image of a candle flame on a white screen using a convex lens.<br />He noted down the position of the candle , screen and lens as under :<br />Position of candle = 26.0 cm<br />Position of convex lens = 50.0 cm<br />Position of screen = 74.0 cm<br />i) What is the focal length of the convex lens?<br />ii) Where will the image be formed if he shifts the candle towards the lens at a<br />position of 38 cm?<br />iii) Draw a ray diagram to show the formation of the image in case (ii) as said<br />above?

Answer 1

the above given distance is given on a ruler

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