AN OBJECT OF HEIGHT 5 CM IS PLACED PERPENDICULAR TO THE PRINCIPAL AXIS OF A CONCAVE LENS OF FOCAL LENGTH 10 CM .IF THE DISTANCE OF THE OPTICAL CENTRE OF THE LENS ES 20 CM .DETERMINE THE POSITION ,NATURE AND SIZE OF THE IMAGE FORMED USING THE LES FORMULA.

Answer 1

1/f = 1/p + 1/q
f = 10, p = 5. They value and sign of q will clue you into its nature.
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