14.2. Images in a Concave Mirror http://www.ck12.org
http://northeyproductions.com/physics-2/reflectio/concave/
Follow up questions:
- What is the name of the line that goes through the center of a concave mirror?
- What is the name of the point where the principal axis touches the mirror?
- Light rays that approach the mirror parallel to the principal axis reflect through what point?
Review
Questions
- A concave mirror is designed so that a person 20.0 cm in front of the mirror sees an upright image magnified
by a factor of two. What is the radius of curvature of this mirror? - If you have a concave mirror whose focal length is 100.0 cm, and you want an image that is upright and 10.0
times as tall as the object, where should you place the object? - A concave mirror has a radius of curvature of 20.0 cm. Locate the image for an object distance of 40.0 cm.
Indicate whether the image is real or virtual, enlarged or diminished, and upright or inverted. - A dentist uses a concave mirror to examine a tooth that is 1.00 cm in front of the mirror. The image of the
tooth forms 10.0 cm behind the mirror.
a. What is the mirror’s radius of curvature?
b. What is the magnification of the image? - When a man stands 1.52 m in front of a shaving mirror, the image produced is inverted and has an image
distance of 18.0 cm. How close to the mirror must the man place his face if he wants an upright image with a
magnification of 2.0?
- concave mirror:Composed of a reflective surface with its sides curved closer in distance to your eye than its
middle surface. - convex mirror:Composed of a reflective surface with its middle surface closer in distance to your eye than
its edges. - spherical mirror:It is a part of a hollow sphere, whose one side is reflecting and other side is opaque.
- focal point:The point on the principal axis of a mirror to which parallel rays of light converge after reflection.
- spherical aberration:Spherical mirrors have a defect that prohibits the mirror from focusing all the incident
light from the same location on an object to a precise point. Rays that strike the outer edges of the mirror fail
to focus in the same precise location as light rays that strike the inner portions of the mirror. The result is that
the images of objects as seen in spherical mirrors are often blurry. - principal axis:The principal axis for a mirror is line passing through the center of the surface of a spherical
mirror and through the center of curvature of the mirror. - mirror equation:d^1 o+d^1 i=^1 f.
- magnification equation:m=−ddoi.