Images formed in a plane mirror
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The document discusses optics and the formation of images in plane mirrors. When light from an object hits a plane mirror, the light rays reflect following the law of reflection and appear to converge at a point behind the mirror. This point is the virtual image of the object. The distance of the object from the mirror equals the distance of the image from the mirror, but with the image distance extended to the back of the mirror.
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Images formed in a plane mirror
- 1. .
- 2. Optics – A specific field of study in physics which is solely devoted to the study of light and its interaction with matter. When you look at the mirror, you see yourself as if you were on the other side of the mirror, which is at the back of the mirror. This is called .
- 3. To illustrate the formation of this image, consider a point O (object). It is located in front of a plane mirror. Light coming from the object hits the mirror at different points and they are reflected following the law of reflection. If you extend the reflection ray to the back of the mirror, you will find a point where all the rays meet. This common point is the image (l) of the point object O. This is called because the object is a point and is located at a distance at the back of the mirror.
- 4. This point image is said to be virtual because light does not actually pass through it. Here, the and are equal but opposite, that is, , where the negative sign denotes that the distance is extended to the back of the mirror.