A boy focusses a sharp image of a distant object on a screen using a lens. The distance between the approximately equal to?
Af/3
B2f
Cf
Df/2
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മാക്സിമം ലിമിറ്റ് സൈസും മിനിമം ലിമിറ്റ് സൈസും തമ്മിലുള്ള വ്യത്യാസത്തെ ________ പറയുന്നു.