Frosted glass is installed in the focal plane of the positive lens. It turned out that the blurring of image details of objects located at a distance a = 5 m from the lens was d = 0.2 mm. Determine the lens aperture if its focal length is F = 10 cm. Note. The aperture ratio of a lens is the square of the ratio of the lens diameter to its focal length.

Detailed solution. Format gif