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This Advanced Undergraduate Text Introduces Einstein's General Theory Of Relativity. The Topics Covered Include Geometric Formulation Of Special Relativity, The Principle Of Equivalence, Einstein's Field Equation And Its Spherically Symmetrical Solution, As Well As Cosmology. An Emphasis Is Place On Physical Examples And Simple Applications Without The Full Tensor Apparatus. It Begins By Examining The Physics Of The Equivalence Principle And Looks At How It Inspired Einstein's Idea Of Curved Spacetime As The Gravitational Field. At A More Mathematically Accessible Level, It Provides A Metric Description Of A Warped Space, Allowing The Reader To Study Many Interesting Phenomena Such As Gravitational Time Dilation, Gps Operation, Light Deflection, Precession Of Mercury's Perihelion, And Black Holes. Numerous Modern Topics In Cosmology Are Discussed From Primordial Inflation And Cosmic Microwave Background To The Dark Energy That Propels An Accelerating Universe-- Back Cover.