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प्रश्न
You are provided with a concave mirror, a convex mirror, a concave lens and a convex lens. To obtain an enlarged image of an object you can use either
विकल्प
concave mirror or convex mirror.
concave mirror or convex lens.
concave mirror or concave lens.
concave lens or convex lens.
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उत्तर
concave mirror or convex lens.
Explanation:
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A concave mirror can produce an enlarged image when the object is placed between the focal point and the mirror. This forms a magnified, virtual image.
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A convex lens can also produce an enlarged image when the object is placed closer to the lens than its focal point. This forms a magnified, virtual image as well.
In contrast:
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A convex mirror always forms a diminished, virtual image.
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A concave lens always produces a diminished, virtual image.
Therefore, the correct options for obtaining an enlarged image are concave mirror and convex lens.
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संबंधित प्रश्न
List four characteristics of the images formed by plane mirrors.
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A student wants to project the image of a candle flame on the walls of the school laboratory by using a mirror.
(a) Which type of mirror should he use and why?
(b) At what distance, in terms of focal length 'f' of the mirror, should he place the candle flame to get the magnified image on the wall?
(c) Draw a ray diagram to show the formation of the image in this case.
(d) Can he use this mirror to project a diminished image of the candle flame on the same wall? State 'how' if your answer is 'yes' and 'why not' if your answer is 'no.'
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An object is placed at the following distances from a concave mirror of focal length 15 cm, turn by turn:
(a) 35 cm
(b) 30 cm
(c) 20 cm
(d) 10 cm
Which position of the object will produce:
(i) a magnified real image?
(ii) a magnified virtual image?
(iii) a diminished real image?
(iv) an image of same size as the object?
If the object is moved further away from the mirror, what changes are there in the position and size of the image?
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Floodlights
