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Siberian Freedom

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Welcome to Siberian Freedom. We are an Australian family living in the Siberian mountains of Altai Russia. Here you can join our family as we build our Siberian homestead, explore beautiful Russian nature and delve into the Russian culture. So come along with us on this amazing adventure into Russia. Follow us on Telegram https://t.me/Siberian_Freedom You can contact us here siberianfreedom@yandex.ru You can post to us at this address Белокуриха, Улица советская, 1, а/я 187 You can support us on =================== PayPal https://www.paypal.com/paypalme/RussiaGuy SberBank +7 992 115 36 54

Rayleigh Criterion

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• Diffraction limits resolution. • For a circular aperture, lens, or mirror, the Rayleigh criterion states that two images are just resolvable when the center of the diffraction pattern of one is directly over the first minimum of the diffraction pattern of the other. • This occurs for two point objects separated by the angle θ = 1.22 λ / D, where λ is the wavelength of light (or other electromagnetic radiation) and D is the diameter of the aperture, lens, mirror, etc. This equation also gives the angular spreading of a source of light having a diameter D. From http://hyperphysics.phy-astr.gsu.edu/hbase/phyopt/Raylei.html Average vision is 5 × 10⁻⁴ radians or 103.13 arcseconds or a ratio of 1:2000 [1 unit resolvable at 2000 units]