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# CBSE Class 10 Answered

Numerical on refraction
Asked by | 27 May, 2008, 06:38: PM
Expert Answer

focal length, f = +10 cm; image distance, v = +12 cm (because real image forms on the wall)

You can calculate the object distance by using lens formula: 1/f = 1/v - 1/u

Rgds

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Answered by | 28 May, 2008, 09:26: AM

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