lens material

What Will Be The Effective Focal Length Of Two Lenses Kept In Contact?

by

What Will Be The Effective Focal Length Of Two Lenses Kept In Contact? When the distance of separation between the two lenses (d) if equal to the sum of the individual focal lengths (f1 + f2), the combined focal length is infinite. This makes the refracted light rays parallel to each other. How do you

Which Convex Lens Has More Focal Length Thick Or Thin?

by

Which Convex Lens Has More Focal Length Thick Or Thin? A thick convex lens has greater curvature or lesser focal length, whereas a thin convex lens has lesser curvature or greater focal length. Which lens has greater focal length thick or thin? Thick lens will have shorter and consequently thin lens will have greater focal