CBSE Class 12-science Answered
where should an object be held from a concave mirror of focal length of 15cm so as to form a real im
Asked by twinkly_sony | 28 Jun, 2009, 07:56: PM
Expert Answer
given: f = - 15 cm; m = - 2
since m = - v / u
v = 2 u
using (1 / f) = (1 / v) + (1 / u)
(1 / -15) = (1 / 2 u) + (1 / u) = 3 / 2u
u = - 22.5 cm
Answered by | 07 Jul, 2009, 04:08: PM
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