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Write the important points related to sign convention |
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Answer» tion:Sign convention - definitionAccording to it: 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.Rules for sign convention :All distances should be measured from the pole.The distances measured in the direction of incident LIGHT, to be taken positive and measured in the opposite direction of incident light to be taken negative.Height of object and height of image are positive if measured UPWARD from the axis and negative if measured downward.For a concave mirror 'f and ‘R’ are negative and for a convex mirror these are positive.Hope it helps |
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