Rohit focussed the image of a candle flame on a white screen using a convex lens.
Channel: Doubtnut
Date: 2020-08-02

Rohit focussed the image of a candle flame on a white screen using a convex lens. He noted position of candle `= 26.0 cm`, position of convex lens `= 50.0 cm` and position of screen `= 74.0 cm`.  (i) What is focal length of convex lens?  (ii) Where will the image be formed if he shifts the candle towards the lens at a position of 38 cm ?  (iii) Draw a ray diagram to show the formation of image in (ii) above.