how to use sign convention in sperical mirror
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Sign Convention for Spherical Mirror:
Sign is taken as + (positive) behind the spherical mirror. For example if an image is formed behind the mirror, the distance of image is taken as + (positive) from pole along the principal axis.
The height of is taken as + (positive) above the principal axis and taken as – (negative) below the principal axis.
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the side from where rays come is always taken -ve
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