{"id":89658,"date":"2022-02-12T13:25:22","date_gmt":"2022-02-12T07:55:22","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/?p=89658"},"modified":"2024-01-16T14:22:49","modified_gmt":"2024-01-16T08:52:49","slug":"a-to-study-the-nature-and-size-of-the-image-formed-by-a-convex-lens-on-a-screen-by-using-a-candle-and-a-screen-for-different-distances-of-the-candle-from-the-lens","status":"publish","type":"post","link":"https:\/\/infinitylearn.com\/surge\/study-material\/physics\/a-to-study-the-nature-and-size-of-the-image-formed-by-a-convex-lens-on-a-screen-by-using-a-candle-and-a-screen-for-different-distances-of-the-candle-from-the-lens\/","title":{"rendered":"(a) To study the nature and size of the image formed by a convex lens on a screen by using a candle and a screen (for different distances of the candle from the lens)"},"content":{"rendered":"

(a) To study the nature and size of the image formed by a convex lens on a screen by using a candle and a screen (for different distances of the candle from the lens)<\/span><\/strong><\/h2>\n

Aim<\/strong><\/span>
\nTo study the nature and size of the image formed by a convex lens on a screen by using a candle and a screen (for different distances of the candle from the lens).<\/p>\n

Apparatus<\/strong><\/span>
\nAn optical bench with three uprights, a convex lens with holder, a burning candle, a card-board screen.<\/p>\n

Theory<\/strong><\/span>
\n\"to-study-the-nature-and-size-of-the-image-formed-by-a-convex-lens-on-a-screen-by-using-a-candle-and-a-screen-for-different-distances-of-the-candle-from-the-lens-1\"
\n\"to-study-the-nature-and-size-of-the-image-formed-by-a-convex-lens-on-a-screen-by-using-a-candle-and-a-screen-for-different-distances-of-the-candle-from-the-lens-2\"
\nAs the object (burning candle) is moved from infinity towards the convex lens, its image (position of screen) moves from lens focus towards infinity.
\nFor candle distance less than focal length, image becomes virtual and does not come on screen.<\/p>\n

Diagram<\/strong><\/span>
\nSimilar to Ray diagram (Experiment 3 : Section B) having a burning candle in place of object needle and cardboard screen in place of image needle.<\/p>\n

Procedure<\/strong><\/span>
\nFind rough focal length of the convex lens by usual method.
\nMount the convex lens in holder in central upright and keep it in the middle of the optical bench.
\nMount the card-board screen on another upright and keep it at distance equal to rough focal length of the lens, from the central upright.
\nMount the burning candle in third upright and keep it on the other side of the central upright and near the end of the optical bench.
\nAdjust heights so that the inverted image of erect flame of burning candle is formed on screen. Move the screen to make the image sharp. The screen will be nearly at the focus of the convex lens.
\nThe image will be real inverted and much more diminished.
\nAs the burning candle is moved towards the lens on one side, the screen has to be moved away from the lens on other side, for getting sharp flame image. The inverted image size increases.
\nWhen the position of the candle is at distance 2f from the lens, the screen is also at same distance on the other side. The image size will be equal to the actual flame size.
\nMove the candle further nearer to the lens. The screen has to be moved away for getting an enlarged inverted real image on screen.
\nAs the candle reaches the focus of the lens, the screen may not be able to get its image which will be at infinity i.e. beyond the ends of the optical bench.<\/p>\n

Conclusion<\/strong><\/span>
\nThis change in position, nature and size of the image is according to theoretical predictions.<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

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