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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Transcribed Image Text: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
B
h'
Q
I
k
9
P
1
The magnification equation and the sign convention for q imply that real images of real objects are
always inverted (if both p and q are positive, m is negative); virtual images of real objects are always
upright (if p is positive and q is negative, m is positive). Keeping the signs of p and q straight in your
mind is the most challenging aspect of mirrors (and lenses). Fortunately, table 23.2 summarizes
when p and q are positive and when they are negative.
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