sodium light

The greatest wave length he has thus found is one one-thousandth of a centimeter, which is seventeen times that of sodium light.

The lustre is resinous to adamantine, and the index of refraction high (2.369 for sodium light).

There is a slight difficulty to be noted in consequence of the fact that there are two series of waves in sodium light.

If we take the wave length of sodium light λ as our standard, the growth in length per second is equal to λ.

This order of magnification would lengthen a wave of sodium light to about 3,000 cm.