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.
Rating Newest Oldest. Best Answer: Yes, salt water freezes. The temperature at which this happens depends on the salinity (amount of salt in the water). Ocean water is about 3.5% salt (mostly sodium chloride, just like table salt). At this salinity, the freezing temperature is about -2 degrees Celsius (about 28 degrees F), so sea water can stay liquid for a little while after fresh water would freeze. Source(s): Littlebit Â· 9 years ago.