An object is kept in front of a concave mirror of focal length 15 cm. The image formed is three times the size of object. Calculate two possible distances of the object from the mirror.

An object is kept in front of a concave mirror of focal length 15 cm.

1.	An object is kept in front of a concave mirror of focal length 15 cm. The image formed is three times the size of object. Calculate two possible distances of the object from the mirror.
Answer» given image is 3 times that of object. so there is 2 case: image is REAL , inverted and MAGNIFIED OR the image is virtual , erect and magnified. so m= 3 or -3 . hence v = 3u or v = -3u . f = -15 CM (given). Using mirror formula:1/u+1/3u = -1/15 gives u = -20 cm.OR1/u - 1/3u = -1/15 gives u = -10 cm.Plz mark me brainliest.

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An object is kept in front of a concave mirror of focal length 15 cm. The image formed is three times the size of object. Calculate two possible distances of the object from the mirror.​

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An object is kept in front of a concave mirror of focal length 15 cm. The image formed is three times the size of object. Calculate two possible distances of the object from the mirror.