Question
Download Solution PDF6 सेमी व्यास की एक वस्तु को +5.0 D की क्षमता वाले लेंस के सामने 10 सेमी की दूरी पर रखा जाता है। वस्तु के प्रतिबिंब का व्यास होगा:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFसही उत्तर विकल्प 1)12सेमी है
दिया गया:
\(do=6cm,u=-10cm\) एक लेंस की जिसकी शक्ति +5.0 D है।
सूत्र:
लेंस की शक्ति: \(P={1\over f}\)
लेंस सूत्र: \({1\over f}={1\over v}-{1\over u}\)
गणना:
\(P={1\over f}\)
\(f={1\over P}={1\over5}=0.2m=20cm\)
\({1\over f}={1\over v}-{1\over u}\)
\({1\over 20}={1\over v}-{1\over -10}\)
\({1\over v}={1\over 20}+{1\over -10}={20-10\over200}\)
\(v={200\over 10}=-20cm\)
हम जानते हैं कि, लेंस का आवर्धन:
\(m={di\over do}={v\over u}\)
\({di\over 6}={-20\over -10}=2\)
\(di=6*2=12cm\)
इसलिए, छवि का व्यास 12 सेमी है।
Last updated on Jun 2, 2025
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