Materials with density less than that of water ___ in it.
Name a liquid whose mass density is less than that of water but is optically denser than water.
If there is a convex lens which is made of a material whose optical density is less than that of air, then
A thin uniform cylindrical shell, closed at both ends, is partially filled with water. It is floating vertically in water in half – submerged state. If ρc is the relative density of the material of the shell with respect to water, then the correct statement is that the shell is