CONVEX AND CONCAVE

Real Images

occurs when light rays actually intersect at the image

Virtual Images

occur when light rays do not meet at the image, but because theye projects light rays backward, we are tricked into seeing an image that is erect or upright

Plane Mirrors

are the common, every day, f;at mirrors that we see everywhere.

Spherical Mirror

a spherical surface, then cut and polish it such that light, which emerges from a point source, can be focused to converge to a point image

Concave Mirrors

are able to make light rays converge to a focus. The image is formed by converging rays that pass through it

Virtual, larger, upright

Object is located between the mirror and the focus

Real, upside-down, larger/smaller

If the object is located farther than the focus

Virtual

Type of images formed by Convex mirror are always _

Center of Curvature

the center of the circle in which the mirror represents a small arc

Focus

the point where parallel light rays converge; the focus is always found on the inner part

of the "circle" of which the mirror is a small arc; the focus of a mirror is one-half the radiug

Vertex

The point where the mirror crosses the principal axis

Principal Axis

a line drawn through the vertex, focus, and center of curvature of the mirror upon which the object rests

Radius of the curvature

The distance from the center of curvature to the vertex of the mirror corresponds to the radius of the circle

Ray Diagram

traces the path that light takes in order for an individual to view a point on the image of an object.

Parallel

Any rat through the focal point will reflect _ to the principal axis

Reflect

Any ray parallel to the principal axis will _ so that it passes through the focal point

Reflect back

Any ray that passes through the center will _ _ through the center

Principal Ray

Is the ray that leaves a point on an object facing the mirror parallel to the principal axis

Between the focus and the center of the curvature, real, inverted, smaller than the object

Object is beyond the center of the curvature

At the center of the curvature, real, inverted, same size as the object

Object at the center of curvature

Beyond the cebter of curvature, real, inverted, magnified, or larger than the object

Object between the center of the curvature and focal point

At the focal point, no image js formed because the focal and chief rays will not meet

Object at the focal point

Appears behind the mirror, upright, virtual, magnified, or larger than the object

Object between the mirror and the focal point

At the focus, real, inverted, and smaller than the object

Object at affinity

Principal Ray

is the ray that leaves a point on an object facing the mirror parallel to the principal axis. When reflected, this ray passes through the focal point of the mirror.

Focal Ray

is the ray that leaves the same point on the object and immediately passes through the focal point, hitting the mirror and reflecting parallel to the principal axis. Its path is opposite that of a principal ray.

Chief Ray

is the ray that leaves the same point on the object and passes through the center of curvature of the mirror. This ray returns along the same path after hitting the reflecting surface.