. A candle is placed in front of a lens and its real image is formed on a screen placed at 50 cm from the lens. The image is twice the size of the object. Four students made the following conclusions. (i) The lens is concave and the focal length is 25 cm (ii) The lens is convex and the object is placed at 25 cm from the lens (iii) The lens is concave, focal length is 16.67 cm and height of the image is 2 cm (iv) The lens is convex with a focal length of 16.67 cm The correct observation is a) (i) and (iii) b) (ii) and (iv) c) only (iii) d) only (ii)
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1 and 3 as in concave lens image formed is bigger in size and focal length will be divided
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