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if two lenses of focal length 20cm and 10 cm used in the combination what will be the combined power of lense​

Answer» <html><body><a href="https://interviewquestions.tuteehub.com/tag/power-2475" style="font-weight:bold;" target="_blank" title="Click to know more about POWER">POWER</a> of <a href="https://interviewquestions.tuteehub.com/tag/lense-1071862" style="font-weight:bold;" target="_blank" title="Click to know more about LENSE">LENSE</a> = 1÷20 + 1÷10 = 0.05 + 0.5Explanation: = 0.55</body></html>


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