You have a concave spherical mirror (the same holds if you had a convex mirror) If the value of q(the distance from the image to the mirror along the principal axis of the mirror) is 1.86m and thedistance of p (the distance from the object to the mirror along the principal axis of the mirror) is3.7m, what is the focal length of the mirror?PhACBh'QIk9P1The magnification equation and the sign convention for q imply that real images of real objects arealways inverted (if both p and q are positive, m is negative); virtual images of real objects are alwaysupright (if p is positive and q is negative, m is positive). Keeping the signs of p and q straight in yourmind is the most challenging aspect of mirrors (and lenses). Fortunately, table 23.2 summarizeswhen p and q are positive and when they are negative.

You have a concave spherical mirror (the same holds if you had a convex mirror) If the value of q (the distance from the image to the mirror along the principal axis of the mirror) is 1.86m and the distance of p (the distance from the object to the mirror along the principal axis of the mirror) is 3.7m, what is the focal length of the mirror? P h A C k B h' Q k P 9 V

You have a concave spherical mirror (the same holds if you had a convex mirror) If the value of q (the distance from the image to the mirror along the principal axis of the mirror) is 1.86m and the distance of p (the distance from the object to the mirror along the principal axis of the mirror) is 3.7m, what is the focal length of the mirror? P h A C k B h' Q k P 9 V

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