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AB and CD two spherical mirrors, forms parts of a hollow sherical ball with its centre at O as shown in the diagram. If arc AB=1/2 arc CD, what is the ratio of their focal lengths? State which of the two mirrors will always from virtual image of an object placed in front of it and why? |
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Answer» Solution :Focal length of both the mirrors will be the same 1:1. Mirror AB will always FORM virtual IMAGE as it is a DIVERGING /convex mirror. |
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