Physics

Tuesday, July 31, 2007

type of mirror

There are 2 types of mirror:


One is convex mirror


it is a curved mirror in which reflective surface bulges toward the light source. such mirror always form a virtual image, since the fokal or focus and the center of curvature or also known as radius are both imaginary points "inside" the mirror which cannot be reached


Image


The image is always virtual (rays haven't actually passed though the image), diminished (smaller), and upright . These features make convex mirrors very useful: everything appears smaller in the mirror, so they cover a wider field of view than a normal plane mirror does as the image is "compressed". The passenger-side mirror on a car is typically a convex mirror. In some countries, these are labelled with the safety warning "Objects in mirror are closer than they appear", to warn the driver of the convex mirror's distorting effects on distance perception.



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