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Plane Mirrors

Plane Mirrors. Mirror Image. Viewing a mirror shows an image. Light rays from an object reflect from the mirror. The eye traces the rays back to an image. Plane Mirror. The law of reflection applies to each ray from the source at the mirror.

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Plane Mirrors

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  1. Plane Mirrors

  2. Mirror Image • Viewing a mirror shows an image. • Light rays from an object reflect from the mirror. • The eye traces the rays back to an image.

  3. Plane Mirror • The law of reflection applies to each ray from the source at the mirror. • Images are formed at the point where rays intersect. • Appear to originate at the image

  4. The object distance is the distance from the object to the mirror or lens: Denoted by p The image distance is the distance from the image to the mirror or lens: Denoted by q Image Distance p q

  5. Image Magnification • The lateral magnification of the mirror or lens is the ratio of the image height to the object height. • Denoted by M ho hi

  6. Plane Mirror Geometry • For a plane mirror the image distance equals the object distance. • Magnification equals 1

  7. Refracted Image

  8. Virtual and Real • A real image is one in which light actually passes through the image point. • Real images can be displayed on screens. • A virtual image is one in which the light does not pass through the image point. • Virtual images cannot be displayed on screens • The light appears to diverge from that point • To find where an image is formed, it is always necessary to follow at least two rays of light. next

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