The image of a candle flame formed by a lens is obtained on a screen placed on the other side of the lens. According to new cartesian sign convention, if the image is three times the size of the flame, then the lens is : (a) Concave and magnification is + 3 (b) Concave and magnification is - 3 (c) Convex and magnification is – 3 (d) Convex and magnification is + 3
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Answer:
(c) Convex and magnification is -3
Explanation:
As the image is formed at other side of the lens, it is convex lens and image formed by the convex lens on the other side of the lens will always be real, inverted, so the magnification will be negative
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