The electromagnetic spectrum

Online units conversion site.

Applet that shows discrete emission and absorption spectra of the elements (University of Oregon).

This is a chart of the electromagnetic spectra:

Another view of the electromagnetic spectra:

The following are blackbody curves for several temperatures:

The following compares the sun's theoretical blackbody spectra to the earths. Note that the scales for each (left and right) are very different.

The following is the measured blackbody curve for the sun; upper curve is at the top of the earth's atmosphere, bottom curve is at the bottom of the earth's atmosphere:

A second version of the previous graph:

The following shows the sun's blackbody curve, the earth's blackbody curve and the absorption spectra of the earth's atmosphere (the curves are not to scale; the earth gives off much less energy):

Another view of atmospheric absorbtion:

Heat flow in the atmosphere:

Heat flow from an object on the earth: