Photosphere but more tenuous corona. Other "surface features" on the photosphere are solar flares and sunspots. Photosphere The photosphere is a star's outer shell from which light is radiated. The term itself is derived from Ancient Greek roots, φῶς, φωτός/"phos, photos" meaning "light" and σφαῖρα/"sphaira" meaning "sphere", in reference to it being a spherical surface that is perceived to emit light. It extends into a star's surface until the plasma becomes opaque, equivalent to an optical depth of approximately 2/3, or equivalently, a depth from which 50% of light will escape without being scattered. In other words, a photosphere is the
Shell plating more-or-less vertical Side Shell and is generally curved. See also Chine (boating). Side: is the plating which extends from the Bilge strake(s) to the Shear strake. Shear: is a special strake of the Side plating. It is the strake that connects the Side Shell to the Strength Deck. Stringer: is a special strake of the Strength Deck plating. It is the strake that connects the Strength Deck to the Side Shell. Strength Deck: is a special deck. It is normally the uppermost continuous deck and forms the top flange of the hull girder. Shell plating Shell plating is the outer-most