Observing a spaceship traveling at a significant fraction of the speed of light. Describe the principles of Einstein’s theory of relativity and how they differ from classical mechanics. Discuss the concepts of time dilation and length contraction, and how they manifest at relativistic speeds. Explain how the speed of light is a constant in all frames of reference and how this leads to the conclusion that time and space are interconnected. Describe the practical implications of relativity in modern technology, such as GPS systems, and in understanding the behavior of objects in extreme environments, such as near black holes.