is kept separated along the optical axis by a distance of 20 cm between them. The combination behaves as a lens

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A combination of two thin convex lenses of equal focal lengths, is kept separated along the optical axis by a distance of 20 cm between them. The combination behaves as a lens
09
Oct
A combination of two thin convex lenses of equal focal lengths, is kept separated along the optical axis by a distance of 20 cm between them. The combination behaves as a lens A combination of two thin convex lenses of equal focal lengths is kept separated along the optical axis by a distance of 20 [...]
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