5cm फोकस दूरी का अभिसारी लैस 10cm फोकस दूरी के अभिसारी लैंस के सम्पर्क मे है। संयुक्त निकाय की फोकस दूरी ज्ञात किजिए
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Answered by
1
Answer:
15cm
Explanation:
noooo
but my mind brenly in the try to question s
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