Suggest the method to find appropriate f of a concave mirror
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1/f=1/v-1/u this formula can find focal length of a concave mirror where f=focal
length , u=object distance and v=image distance
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When these parallel rays of light fall on a concave mirror along its axis, reflect and meet at a point in front of themirror, which is called as Principalfocus of the mirror. A real, inverted and very small image size is formed at the focus of the mirror.
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