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 he 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?

A student focussed the image of a candle flame on a white screen using a convex lens. He noted down the position of the candle, screen and the lens as under Position of candle = 12.0 cm Position of convex lens = 50.0 cm Position of the screen = 88.0 cm (i) What is the focal length of the convex lens ? (ii) Where will the image be formed if he shifts the candle towards the lens at a position of 31.0 cm . (iii) What will be the nature of the image formed if he further shifts the candle towards the lens ? (iv) Draw a ray diagram to show the formation of the image in case (iii) as said above.

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.

A student focused the image of a candle flame on a white screen by placing the flame at various distance from a convex lens. He noted his observation as mentioned in the following table. Analyze the above table and answer the following questions. What is the focal length of the convex lens?

A student focussed the image of a candle flame on a white screen by placing the flame at various distances from a convex lens. He noted his observations as : What type of lens is a convex lens?

A student focussed the image of a candle flame on a white screen by placing the flame at various distances from a convex lens. He noted his observations as : Which set of observations is incorrect?

A convex lens of focal length 10.0 cm is placed in contact with a convex lens of 15.0 cm focal length. What is the focal length of the combination ?