Cambridge Encyclopedia » Cambridge Encyclopedia Vol. 27

Fraunhofer lines

absorption

Sharp, narrow, absorption lines in the spectrum of the Sun, 25 000 of which are now identified. The most prominent lines are due to the presence of calcium, hydrogen, sodium, and magnesium. Most of the absorption occurs in cool layers of the atmosphere, immediately above the incandescent photosphere.

Fray Bentos [next] [back] fraud

User Comments

Your email address will be altered so spam harvesting bots can't read it easily.
Hide my email completely instead?

Cancel or