The great difficulty was to extricate the coloured image of the gaseous structure, spectroscopically visible at the sun's limb, from the encompassing glare, a very little of which goes a long way in fogging sensitive plates.
Here then we have the criterion that was wanted--the means of distinguishing, spectroscopically and chemically, between the cavity and the absorbing layers piled up above it.
The first "new star" which could be spectroscopically examined was that which appeared in Corona Borealis in 1866, and which was studied by Sir W.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "spectroscopically" in a variety of sentences. We hope that you will now be able to make sentences using this word.