Black Hole 2001 - Chapter 1.7 - Examples of Bending of Light



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Ą@ Ą@ Ą@ Ą@ Ą@ Ą@ Ą@ Ą@ Ą@ Ą@ Ą@ Ą@ Ą@ Ą@ Ą@	Chapter 1.7 Examples of Bending of Light The Einstein Cross Four images of the quasar appear around the central glow formed by the nearby galaxy. The Einstein Cross is only visible from the southern hemisphere. In this image of the Einstein Cross (Gravitational Lens G2237 + 0305), light from a distant quasar is seen to bend in its path by the gravitational field of the galaxy to produce four bright outer images. The diffuse central object is the bright core of the intervening galaxy. This image was obtained with the ESA Faint Object Camera (part of the Hubble Space Telescope). The quasar is at a distance of approximately 8 billion light-years, while the galaxy is twenty times closer (400 million light years). Gravitational lensing occurs when the light from a distant source passes through or close to a massive foreground object. Depending on the detailed alignment of foreground and background objects with the line of sight to the Earth, several images of the background object may be seen. Photo credit: NASA and European Space Agency (ESA) More on Light Benders What might you see if you were to orbit a black hole? Computer simulations show that light near the hole gets so bent that the myriad stars behind it would appear as a series of concentric rings. CreditsĄ@ Research: Charles R. Evans, University of North Carolina at Chapel Hill Visualization and Animation: Steven A. Chall, North Carolina Supercomputing Center, MCNC Copyright ?1994, North Carolina Supercomputing Center, MCNC Ą@ BACK Top Forward	Chapter Menu: 1.0 Chapter Introduction 1.1 The Three Principles 1.2 The History of Black Hole 1.3 How Big is a Black Hole 1.4 Why Should we study Black Hole 1.5 Even light cannot escape? 1.6 The Bending of Light 1.7 Examples of Bending of Light 1.8 Gravitational Redshift Main Page

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Thinkquest Team ID : C0122665 Team members: Kenneth, Leo

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