Ques 12

​Q12. Rohit 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 lens as under:

       Position of candle                = 26.0 cm
       Position of convex lens        = 50.0 cm
       Position of screen                 = 74.0 cm

   i) What is the focal length of the convex lens ?

   ii) Where will the image be formed if the shifts the candle towards the lens at a position of 38 cm?

   iii) Draw a ray diagram to show the formation of the image in case (ii) as said above?

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