Physics

Tuesday, July 31, 2007

Types of mirror part 2



Another type of mirror is:




Concave mirror




A concave mirror, or converging mirror, has a reflecting surface that bulges inward (away from the incident light). Unlike convex mirrors, concave mirrors show different types of image depending on the distance between the object and the mirror itself.




These mirrors are called "converging" because they tend to collect light that falls on them, refocusing parallel incoming rays toward a focus. This is because the light is reflected at different angles, since the normal to the surface differs with each spot on the mirror.




Image




Note: S here stands for distance between object and mirror.
When S When S < F, the image is:
Virtual
Upright
Magnified (larger)



























When F < S < 2F, the image is:
Real
Inverted (vertically)
Magnified (larger)






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