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WIP:Mirrors and Lenses presentation

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Mirrors and Lenses: Definitions

The object distance (denoted by p) is the distance from the object to the mirror or lensThe image distance (denoted by q) is the distance from the image to the mirror or lensImages are formed at the point where rays actually intersect or appear to originateThe lateral magnification (denoted by M) of the mirror or lens is the ratio of the image height to the object height

Types of Images for Mirrors and Lenses

A real image is one in which light actually passes through the image pointReal images can be displayed on screensA virtual image is one in which the light does not pass through the image pointThe light appears to diverge from that pointVirtual images cannot be displayed on screensTo find where an image is formed, it is always necessary to follow at least two rays of light as they reflect from the mirror

Flat Mirror

Simplest possible mirrorProperties of the image can be determined by geometryOne ray starts at P, follows path PQ and reflects back on itselfA second ray follows path PR and reflects according to the Law of ReflectionThe image is as far behind the mirror as the object is in front

Flat Mirror

The image height is the same as the object heightThe image is unmagnifiedThe image is virtualThe image is uprightIt has the same orientation as the objectThere is an apparent left-right reversal in the image

h' = h

M = 1

Spherical Mirrors

A spherical mirror has the shape of a segment of a sphereA concave spherical mirror has the silvered surface of the mirror on the inner, or concave, side of the curveA convex spherical mirror has the silvered surface of the mirror on the outer, or convex, side of the curve

Flat Mirror

The image height is the same as the object heightThe image is unmagnifiedThe image is virtualThe image is uprightIt has the same orientation as the objectThere is an apparent left-right reversal in the image

h' = h

M = 1