Suppose you want to observe an erect image of a candle flame using a concave mirror of focal
length 20cm. State the range of distance of the candle flame from the mirror. List two other
characteristics of the observed image. Draw a ray diagram to show the formation of image in this
case.
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Objects distance should be less then the focal length for the formation of an erect image. Hence the range of distance o object from the mirror should be less then 15cm.
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