Light-Reflection & Refraction

Asked by preemnath | 23rd Aug, 2009, 11:58: PM

Expert Answer:

given: R = - 0.4 m; f = - 0.2 m; h = 0.2 m; u = - 0.8 m

v = ?; h' = ?

Using mirror formula

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

(1 / - 0.2) = (1 / v) + (1 / -0.8)

(1 / v) = (1 / 0.8) - (1 / 0.2) = - 3 / 0.8

v = - 8 / 30 = - (4 / 15) m

Magnification (m) = h' / h = - v / u

h' = - v x h / u = - (- 4 / 15) x 0.2 / - 0.8 = - (1 / 15) m 

Answered by  | 24th Aug, 2009, 11:53: AM

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