| In 1946, Irmann and co-workers were preparing rod specimens for spectrographic analysis by hot pressing mixtures of pure aluminum and other metal powders. |
| Commonly a semiconductor radiation detection sensor is used that can also provide spectrographic information on the contamination being collected. |
| Telescopic, gravimetric, and spectrographic scans have revealed fourteen planets in the system. |
| I can't tell what it is without having to conduct a spectrographic analysis first. |
| Worse still, as spectrographic technology improved, additional spectral lines in hydrogen were observed which Bohr's model couldn't explain. |
| However, to the naked eye, the color of emission seems identical among these species, but only spectrographic analysis can prove this. |
