What are the sign conventions of concave and convex mirror?

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the sign of any ( object distance, image distance,focal length etc ) are taken positive if it is in the direction of incident ray else negative * all the distances are measure from the pole
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Types of lens U v f Height of the image Height of the object Real Virtual Real Virtual Real Virtual Convex - + - + No virtual focus - + + Concave - No real image is formed - No...
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Types of lens U v f Height of the image Height of the object Real Virtual Real Virtual Real Virtual Convex - + - + No virtual focus - + + Concave - No real image is formed - No real focus - No real image is formed + + read less
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in case of mirrors the signs are put according to direction of incident ray i.e negative in case of real image, inverted image while positive in case of virtual and erect image
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refer the image
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The following sign convention is used for measuring various distances in the ray diagrams of spherical mirrors: Object is always placed to the left of mirror All distances are measured from the pole of the mirror. Distances measured in the direction of the incident ray are positive and the distances...
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The following sign convention is used for measuring various distances in the ray diagrams of spherical mirrors: Object is always placed to the left of mirror All distances are measured from the pole of the mirror. Distances measured in the direction of the incident ray are positive and the distances measured in the direction opposite to that of the incident rays are negative. Distances measured along y-axis above the principal axis are positive and that measured along y-axis below the principal axis are negative. read less
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