Light-Reflection & Refraction

Asked by preemnath | 23rd Aug, 2009, 11:50: PM

Expert Answer:

given: f = - 20 cm; m = 3; u = ?

m = - v / u

v = - 3 u;

Using mirror formula

(1 / f) = (1 / v) + (1 / u)

(1 / - 20) = (1 /- 3 u) + (1 / u)

(2 / 3 u) = (1 / - 20)

u = -40 / 3 cm

Answered by  | 24th Aug, 2009, 11:59: AM

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