Chapter 13 . Section 3 Curved Mirrors . Calculate distances and focal lengths using the mirror equation for concave and convex spherical mirrors. Draw ray diagrams to find the image distance and magnification for concave and convex spherical mirrors.
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Section 3 Curved Mirrors
For an image in front of the mirror, m is negative and the image is upside down, or inverted
When the image is behind the mirror, M is positive and the image is upright with respect to the object
A concave spherical mirror has a focal length of 10.0 cm. Locate the image of a pencil that is placed upright 30.0 cm from the mirror. Find the magnification of the image. Draw a ray diagram to confirm your answer.
f = +10.0 cmp = +30.0 cm
The mirror is concave, so f is positive. The object is in front of the mirror, so p is positive.
Because the mirror is convex, the focal length is negative. The image is behind the mirror, so q is also negative.
f = –8.00 cm q = –4.44 cm h’ = 2.50 cm
p = ? h = ?
Solve for p
Using magnification equation