A35 Chapter 22 - Chapter 22 Black Holes Accretion disks disk of gas orbiting star or black hole Black Holes o Unseen o Immensely strong gravity o Matter

A35 Chapter 22 - Chapter 22 Black Holes Accretion disks...

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Chapter 22: Black Holes Accretion disks: disk of gas orbiting star or black hole Black Holes o Unseen o Immensely strong gravity o Matter greatly compressed so it violently warps space and time o Gravity is so strong that nothing can escape from it because escape speed would need to exceed speed of light o Existence predicted by theory of relatively o Structure specified by mass, electric charge, angular momentum o Neither matter nor electromagnetic radiation can escape Einstein’s Special Theory of Relativity o Describes how motion affects our measurements of distance and time o Comprehensive description of the behavior of light, electricity, and magnetism o Specialized, does not include effects of gravity o All measurements are made relative to an observer o Distance between two points or time interval between two events are not absolutes values depend on how you are moving, and relative to you o Your description of physical reality is the same regardless of the constant velocity at which you move o Regardless of your speed or direction of motion, you always measure the speed of light to be the same o Spacetime: four dimensional combination of time and the three dimensions of space o Length contraction: shrinking of an object’s length along its direction of motion o Time dilation: slowing of time due to relativistic motion o Any object with mass has energy embodied in it, E=mc 2 Einstein’s General Theory of Relativity describes nature of gravitation
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