At the point of incidence where the ray strikes the mirror, a line can be drawn perpendicular to the surface of the mirror. This line is known as a normal line (labeled N in the diagram). The normal line divides the angle between the incident ray and the reflected ray into two equal angles. The angle between the incident ray and the normal is known as the angle of incidence. The angle between the reflected ray and the normal is known as the angle of reflection.
Even if the water were to be cooled from the bottom, the coldest water would float to the top and when the whole pond became 0Â°C the ice would float to the top as it formed. In some cases where rocks are below the freezing point (exposed to the air part of the time, ice can form and stick to the rocks under water.
As the temperature of ice decreases, it starts to contract. But it still has a greater volume than it does in the liquid state. So you have to be careful when answering the question. When water freezes it becomes a solid, but it is no longer water, it is ice (yes, of course it is just frozen water).his is a problem of states of matter. When water freezes, it changes state from a liquid to a solid. For example, steam will contract with pressure and cooling. The volume of water is not really affected by pressure, but it does contract with cooling. When water freezes, it actually expands.