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An object is placed at a distance of 15 cm from the following mirrors, of focal length 10 cm , find the position nature of image

concave mirror and convex mirror


First we'll take the case of concave mirror..
the mirror formula is.......1/f = 1/v + 1/u.
in our case u = -15cm
                  f = -10cm
therefore  1/-10 = 1/-15 + 1/v
               1/v = 1/-10 + 1/15
                 v = -30
magnification formula is -v/u
the object is magnified with a factor of -2
the image formed is real inverted, magnified.

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