An object of size 4cm is held at the principle focus of a concave lens of f=10cm .explain with reaso

Asked by twinkly_sony | 28th Jun, 2009, 08:01: PM

Expert Answer:

given: h = 4 cm; f = - 10 cm; u = - 10 cm

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

(1 / -10) = (1 / v) + (1 / - 10) 

v = infinity

thus, the image will be formed at infinity.

Answered by  | 7th Jul, 2009, 04:20: PM

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