16 17 A 17 B 18 A 18 B 19 20 21 22 23 24 25 A 25 B 26 27 28

Lakhmir Singh & Manjit Kaur - Physics

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Q. 18 B4.7( 4 Votes )

Define the princi

Class 10th Lakhmir Singh & Manjit Kaur - Physics 5. Refraction of Light

Answer :

The principal focus of a concave lens is a point on its principal axis from which parallal light rays appear to diverge after passing through the lens.

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