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.
This energy is carried to the surface of the Sun which is called photosphere and is emitted as visible and infrared light. At visible wavelengths we are not able to see below the photosphere. However there are many interesting features that can be observed in the photosphere.