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CBSE Class 10 Answered

NUMERICAL(REFRACTION THROUGH SPHERICAL LENSES)
Asked by gunjansingh | 30 May, 2009, 09:09: AM
answered-by-expert Expert Answer

u = ?

f = 15 cm; m = 3

since m =  v / u

v =  3 u 

using (1 / v) - (1 / u) = (1 / f) 

(1 / 3 u) - (1 / u) = (1 / 15)

-2 / 3u = 1 / 15

u = - 10 cm

Answered by | 30 May, 2009, 09:16: AM

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