A wavefront is a surface that connects points in a medium that are reached by a wave at the same time. It represents the shape of the wave as it travels through space, whether it’s a sound wave in air or a light wave in water. Wavefronts can be visualized as a series of concentric circles or planes, depending on the type of wave and its source. In physics, wavefronts are important for understanding how waves propagate and interact with their environment. They are often studied in relation to concepts like refraction, reflection, and interference, which describe how waves change direction or combine when they encounter different materials or other waves.