Bucharest, Romania
Donald F. Collins
Warren Wilson College
Asheville, NC 28815
| The image above contains the source (eclipsed sun with chromosphere still visible) and the imaged spectrum of the chromosphere as viewed through a grating. A Hi-8 mm camcorder was used to record the spectrum. |
| These graphs show the profile of the imaged spectrum
indicating the relative intensity of the emission lines. The wavelength
was calibrated by means of geometry knowing the focal length of the camera
and the pitch of the grating.
Note the Ha, and the Hb emission lines at 656 nm and 486 nm. Note also the He emission line at 587 nm. This line is absent in the Fraunhofer spectra of the sun. The presence of the Helium line in the flash spectrum of the sun was the first discovery of Helium in 1868. |