A. Snow consists of a vast number of crystals (or small prisms), which separate the rays into their elemental colours; but as these crystals are very numerous, the colours unite again before they meet the eye, and appear white.
N. B. The combination of all colours makes white.
Q. Why is sugar white?
A. Sugar consists of a vast number of small crystals, which separate the rays into their elemental colours; but as these crystals are very numerous, the colours unite again before they meet the eye, and appear white.
Q. Why is salt white?
A. Salt consists of a vast number of small crystals, which reflect the various rays of light from different points of the salt; and as these colours unite before they meet the eye, the salt appears to be white.
N. B. The combination of all colours makes white.
Q. Why are the leaves of plants green?
A. Because the carbon of the leaves is a bluish olive, and the sap and tissue of the cells, yellow; when, therefore, the yellow sap flows into the blue carbon, it produces a green leaf.