This handsome wall chart, covering the visible portion of the solar spectrum, shows the location of the more prominent Fraunhofer lines. These dark lines, some narrow, some wide, are caused by the absorption of specific frequencies within the atmosphere of the earth or sun. Both colorful and informative, this chart makes an excellent teaching aid for any science classroom. There are top and bottom metal binding strips on the heavy paper stock. The top band includes a tab suitable for wall hanging.