Question

what is focal length ?
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Answer 1

HEY MATE❤❤

MARK AS BRAINLIEST ❤❤❤❤❤

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

Answer 2

Hey User !

=) The distance between the centre of a lens or curved mirror and its focus .

Hope , It Helps ...