Astrophysik: Gravitationslinsen Scene Info click for Module Menu Start Branching Point Module: Astrophysik: Gravitationslinsen Sequence: Start Slide: Slide: A Galaxy Produces a Multi-image of a Quasar Branching Point: The visible sky is nothing but an optical fraud Sequence: (1) Prinzip Slide: Why does a mass act like a lens ? Slide: Why does a mass act like a lens ? Slide: Why does a mass act like a lens ? Slide: Mass distributions acting as lenses Slide: Glas lens visualizing the effect of a gravitational lens Slide: Extreme Deflections Slide: Strange Optics Slide: Cosmic Distortions Slide: The image of the sky is permanently changing Slide: Encounter of third degree Sequence: (2) History Slide: Early speculations Slide: Einsteins triumph Slide: Einstein remains sceptical Slide: ... an odd publication Slide: Galaxies as gravitational lenses Sequence: (3) Astrophysics Branching Point: Gravitational Lenses as Tools in Astrophysics Sequence: (3.1) galaxies Slide: How Massive is a Galaxy ? Slide: How Massive is a Galaxy Cluster ? Slide: How Massive is a Galaxy Cluster ? Sequence: (3.3) Hubble Slide: How Does the Universe Expand ? Sequence: (3.4) planets Slide: Slide: Planets in Foreign Solar Systems Back Forward Why does a mass act like a lens ? A mass curves the surrounding space time. Light propagates on shortest paths in this geometry and thus appears deflected. The observer perceives two images, situated on the left and right hand side of the source. [ Sitemap ] [ info ] This website was created with Virtual Spaces.