what is focal length?
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the distance between the centre of a mirror or a lens band its focus
एक दर्पण या लेंस के केंद्रबिंदु से उसके फ़ोकस की दूरी; नाभीय दूरी
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एक दर्पण या लेंस के केंद्रबिंदु से उसके फ़ोकस की दूरी; नाभीय दूरी
if u like my answer plz Subscribe my youtube channel motivation wala baba
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hey dear..
the distance between the centre of a lens or curved mirror and its focus is called FOCAL LENGTH..
hope it helps..
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