Icon class icon_class far fa-sticky-note icon_class_computed far fa-sticky-note Note kind DISPLAY STYLE TIP Policy level SUGGESTED Keywords Webel Parsing Analysis Relates to Mass of charged leptons and decay (Part 1) Mass of charged leptons and decay (Part 2) Spin for elementary particles and composite particles Leptons and interactions Modelling antiparticles, antileptons, and antimatter Mass and charge of electron and positron The minimum on mesons An abstract Q(u)ark for M(u)ster M(u)ark There are six types of quarks (and six antiquarks) Protons are spin-1/2 fermions and are composed of three valence quarks, making them baryons The neutron is classified as a hadron, because it is a composite particle made of quarks. The first known practical telescopes were refracting telescopes The reflecting telescope uses mirrors to collect and focus light Many new types of telescopes were invented including radio telescopes and infrared telescopes Optical radiation, visible, UV, and infrared Radio frequencies (just a quick look) An optical telescope is a telescope that gathers and focuses light mainly from the visible part of the electromagnetic spectrum The objective is the optical element that gathers light from the object being observed and focuses the light rays An eyepiece is a type of lens that is attached to a variety of optical devices such as telescopes and microscopes. Most (but not all) telescope designs produce an inverted image at the focal plane Optics: real images vs virtual images and focus points An object infinitely far from the optical system forms an image at the rear focal plane The basic scheme of an optical telescope: Keplerian refractor A curved primary mirror is the reflector telescope's basic optical element The Gregorian telescope employs a concave secondary mirror that reflects the image back through a hole in the primary mirror. The Newtonian telescope has flat secondary mirror and a paraboloid or spherical primary mirror The classic Cassegrain telescope has a parabolic primary mirror and a hyperbolic secondary mirror Related notes [POLICY, STYLE]{STRICT} Webel Parsing Analysis «pa» diagrams are NOT intended as final presentation diagrams! They serve merely to traceably elicit model elements, which may then be shown in other (typically much tidier) presentation diagrams elsewhere. Related notes (backlinks) Related snippets (extracts) Visit also Visit also (backlinks) Flags Book traversal links for Webel Parsing Analysis: If the dashed-line "anchors" from your «snippet» ElementGroup symbols to elicited elements make a «pa» Parsing Analysis diagram too hard to read, try making them light grey using symbol properties. Previous Up Next
