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5 మీటర్ల ఫోకల్ పొడవు గల పుటాకార కటకం శక్తి ఎంత?

  1. 5 D
  2. -5 D
  3. 0.2 D
  4. -0.2 D

Answer (Detailed Solution Below)

Option 4 : -0.2 D

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  • కటకం యొక్క శక్తి ద్వారా ఇవ్వబడుతుంది.
  • ఇక్కడ f అనేది కటకం యొక్క నాభ్యంతరం.
  • ఒక పుటాకార కటకం విషయంలో, ఫోకల్ లెంగ్త్ ప్రతికూలంగా ఉన్నందున శక్తి ఎల్లప్పుడూ ప్రతికూలంగా ఉంటుంది.
  • కాబట్టి,
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