What are some examples of curved mirrors?
A spherical mirror has the shape of part of a sphere’s surface.
Concave Spherical Mirror (Converging Mirror): A spherical mirror with light reflecting from its silvered, concave surface
Concave mirrors are used whenever a magnified image of an object is needed
Terms you need to know
Concave Spherical Mirrors (p.531)
A spherical mirror is represented as a shell of a sphere
Concave Mirror (p.531)
To use the mirror equation, you must use the correct signs.
Object and image distances are positive if they form on the front side of the mirror
Object and image distances are negative if they form on the back side of the mirror
Sample Problem (p.536 #2)
A concave shaving mirror has a focal length of 33 cm. Calculate the image position of a cologne bottle placed in front of the mirror at a distance of 93 cm.
Solve the problem
p = .93 m
f = .33 m
A concave shaving mirror has a focal length of 33 cm. Calculate the magnification of the image. Is the image real or virtual? Is the image inverted or upright?
Sign Conventions for Magnification
Find the magnification
The magnification is negative, therefore the image is real and inverted.
A ray diagram is a drawing that uses geometry to locate an image formed by a mirror.
There are different rules for drawing ray diagrams depending on the type of mirror you have.