Breakwater, artificial offshore structure protecting a harbour, anchorage, or marina basin from water waves. Breakwaters intercept longshore currents and tend to prevent beach erosion.
photosphere. luminous, apparently opaque layer of gases that forms the visible surface of the sun sun,intensely hot, self-luminous body of gases at the center of the solar system.
The photosphere of the Sun is. â¢ the layer above the visible surface, where spicules carry gas upward. â¢ the high-temperature part of the Sun's atmosphere from which the solar wind is ejected into space. â¢ the visible surface of the Sun, where granules and sunspots are found. 3. The electromagnetic spectrum of the Sun.