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The sagitta also has uses in physics where it is used, along with chord length, to calculate the radius of curvature of an accelerated particle. This is used especially in bubble chamber experiments where it is used to determine the momenta of decay particles. Likewise historically the sagitta is also utilised as a parameter in the calculation ...
In optics and especially telescope making, sagitta or sag is a measure of the glass removed to yield an optical curve. It is approximated by the formula It is approximated by the formula S ( r ) ≈ r 2 2 × R {\displaystyle S(r)\approx {\frac {r^{2}}{2\times R}}} ,
The perpendicular line passing through the chord's midpoint is called sagitta (Latin for "arrow"). More generally, a chord is a line segment joining two points on any curve, for instance, on an ellipse. A chord that passes through a circle's center point is the circle's diameter.
The spherometer directly measures a sagitta, h. If the mean length between two outer legs is a, the spherical radius R is given by the formula = + Using a spherometer with a circle cup of diameter D, the spherical radius R is instead given by the formula
Lens clock. A lens clock is a mechanical dial indicator that is used to measure the dioptric power of a lens.It is a specialized version of a spherometer.A lens clock measures the curvature of a surface, but gives the result as an optical power in diopters, assuming the lens is made of a material with a particular refractive index.
WR 128 is a Wolf–Rayet star located about 9,500 light years away in the constellation of Sagitta.A member of the WN class, WR 128's spectrum resembles that of a WN4 star, but hydrogen is clearly present in the star (hence the h in its spectrum), making it the only known hydrogen-rich WN4 star in the galaxy.
13 Sagittae is a single [10] star in the northern constellation of Sagitta.The designation comes from the star catalogue of John Flamsteed, first published in 1712.It can be viewed with the naked eye, having an apparent visual magnitude of 5.33. [1]
Alpha Sagittae, formally named Sham / ˈ ʃ æ m /, [11] [12] is a single [13] star in the northern constellation of Sagitta. Alpha Sagittae is the Bayer designation, which is latinized from α Sagittae and abbreviated Alpha Sge or α Sge. It is visible to the naked eye as a yellow-hued star with an apparent visual magnitude of +4.38. [2]