This diffraction causes the light to form a diffraction pattern, known as the Airy disk, at the focal plane of the microscope. The Airy disk consists of a central bright spot surrounded by concentric ...

the resulting diffraction pattern is similar to the diffraction pattern of a small circular aperture (Airy's disk pattern). The difference is that in a lycopodium powder diffraction, light gets ...

Graney calculated the intensity of the diffraction pattern for stars of different brightnesses. He then worked out Galileo's detection threshold and calculated the size of the Airy disk that each ...