Question

show the actual refraction from a concave lens. why a concave lens bends a light ray which is on the top if principal axis in upward direction and bend a light ray which is on the bottom of principal axis in downward direction??


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Answer 1

Answer:

Light rays passing through a lens always bend toward the thickest part of the lens. Light waves bend toward the thick center in a convex lens. They bend out toward the thick edge in a concave lens. Because it can focus light, a convex lens can form a real image.