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Find the power of concave lens focal length is 4 m |
Answer» <html><body><p><strong>Answer:</strong></p><h3>Power of a lens is equal to the <a href="https://interviewquestions.tuteehub.com/tag/reciprocal-1180061" style="font-weight:bold;" target="_blank" title="Click to know more about RECIPROCAL">RECIPROCAL</a> of its <a href="https://interviewquestions.tuteehub.com/tag/focal-2648683" style="font-weight:bold;" target="_blank" title="Click to know more about FOCAL">FOCAL</a> <a href="https://interviewquestions.tuteehub.com/tag/length-1071524" style="font-weight:bold;" target="_blank" title="Click to know more about LENGTH">LENGTH</a>. It is <a href="https://interviewquestions.tuteehub.com/tag/given-473447" style="font-weight:bold;" target="_blank" title="Click to know more about GIVEN">GIVEN</a> by : So, the power of the lens is 0.25 D</h3></body></html> | |