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5 मीटर लांबीच्या अवतल भिंगाची शक्ती किती असेल?

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

Answer (Detailed Solution Below)

Option 4 : -0.2 D

Detailed Solution

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  • भिंगाची शक्ती या सूत्राने दिली जाते.
  • येथे f हे भिंगाचे नाभीय अंतर आहे.
  • अवतल भिंगाच्या बाबतीत, नाभीय अंतर ऋणात्मक असल्याने शक्ती नेहमीच ऋणात्मक असेल.
  • म्हणून,
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