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How to know about the image distance - or + in concave mirror and also in convex lens

Posted by Deepak Singh 5 years, 11 months ago

CBSE > Class 10 > Science

1 answers

????? ?????? 5 years, 11 months ago

When image is virtual and erect then the image distance will be positive but when it is real and inverted then the image distance will be negative. In concave mirror only in one case when object is between pole and focus then the image distance will be positive. In convex mirror image distance is always positive.

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CBSE > Class 10 > Science