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CBSE Class 10 Answered

Numerical
Asked by | 01 Jul, 2009, 10:00: PM
answered-by-expert Expert Answer

h = 40 cm; u = - 25 cm; f = 15 cm; v = ?; h' = ?

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

(1 / 15) = (1 / v) + (1/ -25)

v = 75 / 8 cm = 9.4 cm

since m = - v / u = h' / h

h' = - v x h / u = - 75 x 40 / 8 x (- 25) = 15 cm

image is virtual and erect.

 

Answered by | 07 Jul, 2009, 03:06: PM

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