Relativity of Simultaneity

The relativity of simultaneity is the idea that whether two events occur at the same time depends on your observer’s motion. In Einstein's theory of relativity, observers moving at different speeds may disagree on whether two events happening far apart happen simultaneously. For example, one person might see two flashes of lightning as simultaneous, while another moving at high speed might see one flash before the other. This happens because time and space are linked; moving observers measure time differently, which changes their view of simultaneity without any contradiction in physics.