# Physic

A spherical concave mirroe has a radius =0.4m forms an image of a 0.2 m high object located 1m from the vertex of mirror. find the position and height of the image. ?

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1. 1/Do + 1/Di = 2/R
Di is the image distance and Do is the object distance. Surely you have seen this equation before, if you have been doing your studies.

1/1 + 1/Di = 2/0.4

1 + 1/Di = 5

1/Di = 4 Di = 1/4 m

The image is demagnified by a factor Di/Do = 1/4

What is 1/4 of 0.2 ?
Di = 1/4 m is the image dstance

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posted by drwls

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