CHAPTER XV.
3.—REFLECTION OF HEAT.
Q. What is meant by reflecting heat?
A. To reflect heat, is to throw it back in rays from the surface of the reflecting body, towards the place from whence it came.
Q. What are the best reflectors of heat?
A. All bright surfaces, and light colours.
Q. Are good absorbers of heat good reflectors also?
A. No; those things which absorb heat best, reflect heat worst; and those which reflect heat worst, absorb it best.
Q. Why are those things which absorb heat unable to reflect it?
A. Because if any thing sucks in heat like a sponge, it cannot throw it off from its surface; and if any thing throws off heat from its surface, it cannot drink it in.