Rayleigh distance Rayleigh distance Rayleigh distance in optics is the axial distance from a radiating aperture to a point at which the path difference between the axial ray and an edge ray is λ / 4. An approximation of the Rayleigh Distance is formula_1, in which Z is the Rayleigh distance, D is the aperture of radiation, λ the wavelength. This approximation can be derived as follows. Consider a right angled triangle with sides adjacent formula_2, opposite formula_3and hypotenuse formula_4. According to Pythagorean theorem, formula_5. Rearranging, and simplifying formula_6 The constant termformula_7 can be neglected. In antenna applications, the Rayleigh distance is
A Guy Called Gerald This way it makes it easy for me to create the atmosphere and the rhythm suitable for the individual dancefloor. Kind of like an open kitchen in a restaurant – it’s an open kitchen in a club bringing the food to the people instantly – as soon as it’s produced it’s already on the dancefloor. What I’m looking for in 2015 is sound reproduction in the clubs being taken a lot more seriously than in the past."" A Guy Called Gerald Gerald Simpson (born 16 February 1967), better known as A Guy Called Gerald, is a British DJ, record producer