The front of a wave midway to its destination typically appears as a curved shape, specifically a portion of a larger circular or spherical wavefront. This shape arises due to the spreading of the wave energy in all directions from its source.
For simplicity, let's consider an example of a water wave propagating in a circular pattern on the surface of a pond. When the wave is midway to its destination, the front of the wave will resemble a semicircular shape. The center of the semicircle corresponds to the source of the wave, and the semicircular arc represents the leading edge of the wavefront.
It's important to note that the specific appearance of the wavefront can vary depending on the type of wave and the medium through which it propagates. Waves in different mediums, such as water, air, or electromagnetic waves, can exhibit diverse characteristics and wavefront shapes.