Search results
Results From The WOW.Com Content Network
Angular resolution. A series of images representing the magnification of M87* with an angular size of some microarcseconds, comparable to viewing a tennis ball on the Moon (magnification from top left corner counter−clockwise to the top right corner). Angular resolution describes the ability of any image-forming device such as an optical or ...
The magnification of the eyepiece depends upon its focal length and is calculated by the same equation as that of a magnifying glass (above). Note that both astronomical telescopes as well as simple microscopes produce an inverted image, thus the equation for the magnification of a telescope or microscope is often given with a minus sign .
Gravitational lensing. In general relativity, a point mass deflects a light ray with impact parameter by an angle approximately equal to. where G is the gravitational constant, M the mass of the deflecting object and c the speed of light. A naive application of Newtonian gravity can yield exactly half this value, where the light ray is assumed ...
The ray transfer equation thus becomes: [] = [], and this relates the parameters of the two rays as: = + = Another simple example is that of a thin lens . Its RTM is given by: L = [ 1 0 − 1 f 1 ] , {\displaystyle \mathbf {L} ={\begin{bmatrix}1&0\\-{\frac {1}{f}}&1\end{bmatrix}},} where f is the focal length of the lens.
Cardinal point (optics) In Gaussian optics, the cardinal points consist of three pairs of points located on the optical axis of a rotationally symmetric, focal, optical system. These are the focal points, the principal points, and the nodal points; there are two of each. [1] For ideal systems, the basic imaging properties such as image size ...
Defining equation SI units Dimension Lens power P = / m −1 = D (dioptre) [L] −1: Lateral magnification m = / = / dimensionless dimensionless Angular magnification m = / dimensionless dimensionless
Energy level. En = energy eigenvalue. n = principal quantum number. e = electron charge. me = electron rest mass. ε0 = permittivity of free space. h = Planck constant. E n = − m e 4 / 8 ε 0 2 h 2 n 2 = − 13.61 e V / n 2 {\displaystyle E_ {n}=-me^ {4}/8\varepsilon _ {0}^ {2}h^ {2}n^ {2}=-13.61\,\mathrm {eV} /n^ {2}}
In optics, the Abbe sine condition is a condition that must be fulfilled by a lens or other optical system in order for it to produce sharp images of off-axis as well as on-axis objects. It was formulated by Ernst Abbe in the context of microscopes. [1] The Abbe sine condition says that. the sine of the object-space angle should be proportional ...