Question

Write the signs of object distance and focal length from the figure

Answer 1

Concave mirror :-

Object distance _ '-ve'

Focal length _ '-ve'

Convex mirror :-

Object distance _'-ve'

Focal length_'+ve'

Concave lens :-

Obj.dist._'-ve'

F.length_'-ve'

Convex lens :-

Obj.dist._'-ve'

F.length_'+ve'

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