Numerical

Asked by  | 1st Jul, 2009, 10:06: PM

Expert Answer:

Since P = P1 + P2

or 1 / f = 1/ f1 + 1/ f2

5 = (1 / 0.15) + (1 / f2)

(1 / f2) = (5 x 0.15 - 1) / 0.15

(1 / f2) = - 0.25 / 0.15

f2 = - 3 / 5 = - 0.6 m = - 60 cm

Answered by  | 6th Jul, 2009, 04:02: PM

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