Examples from the Web for fraunhofer
Two experiments with a spectroscope will help to make clear the meaning of the Fraunhofer lines.Physics|Willis Eugene Tower
Its light is of course that of the sun reflected, and its spectrum is consequently a faint echo of the Fraunhofer spectrum.
The lower-case letters designating certain Fraunhofer lines: a, b, g, h.The Uses of Italic|Frederick W. Hamilton
It accordingly forms part of the large sum of Fraunhofer's merits to have secured this inestimable advantage to observers.
The four long-neglected small heliometers made by Fraunhofer were brought into requisition.