1. Two thin lenses of focal lengths f₁ and f₂ separated by a distance d have an equivalent focal length of 40 cm. The co
Posted: Wed Jun 08, 2022 8:18 pm
1. Two thin lenses of focal lengths f₁ and f₂ separated by a distance d have an equivalent focal length of 40 cm. The combination satisfies the conditions for minimum spherical aberration and is also achromatic. Find the values of f₁, f₂ and d. Assume that both the lenses are of the same material. [2+2+2]