michaeldsilva042 michaeldsilva042

10-02-2024
Physics

contestada

5) Two lenses are of power +2.5 D and - 5 D are combined to form a compound lens. The focal
length of combination of lens will be:
(a) 40 cm concave
(c) 80 cm convex
(b) 40 cm convex
(d) 80 cm concave

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