| Name | Value |
|---|---|
| NAME | 6650-439734 |
| LIFE EXPECTANCY | 10 |
| BRIEF DESCRIPTION | SPECTROGRAPH |
| NOMENCLATURE | SPECTROGRAPH. AN OPTICAL INSTRUMENT DESIGNED TO BREAK UP THE LIGHT FROM A SOURCE INTO ITS CONSTITUENT WAVE LENGTHS AND TO PROVIDE A MEANS OF QUALITATIVE OR QUANTITATIVE STUDY OF THE SPECTRUM LINE FORMED. THE INSTRUMENT ESSENTIALY CONSISTS OF FOUR PARTS: THE SLIT, THE LENSES, THE DISPERSION SYSTEM AND PHOTOGRAPHIC OR PHOTOELECTRIC SYSTEM. THE INSTRUMENT MAY INCORPORATE A PRISM OR GRATING SYSTEM FOR THE DISPERSION OF LIGHT. |