But if a spectrum of bright lines is given by a nebula, we can be certain that gases at low pressure are present in the object under examination.
Here again we have hydrogen and helium represented by bright lines, while the origin of the remaining bright lines is doubtful.
But the spectrum of iron, as here described, consists of bright lines; while those with which it is compared in the sun are dark on a bright background.
The spectrum of a glowing mass of gas will consist in a number of bright lines of various colours, and at various intervals; corresponding to each kind of gas, there will be a peculiar and distinctive arrangement of bright lines.
It shows 600 bright lines sharply in focus besides the dark-line spectrum, to which the bright lines gave way as the sun reappeared.
By them was made the capital discovery that the red solar prominences give a spectrum of bright lines, and are therefore immense masses of incandescent gases, chiefly hydrogen and the vapours of calcium and helium.
Secchi knew little or nothing concerning stars whose spectra contain bright lines, except as to the isolated bright-line spectra of a few nebulae, and as to the bright hydrogen lines in gamma Cassiopeia, and his system did not include these.
But, in 1864, it was established by Sir William Huggins that the light is due, not to reflection or phosphorescence, but to incandescence, for the spectrum consists of bright lines such as are yielded by glowing gas.
The remaining Class IV is an extremely small one: the spectra are characterised by bright lines: some of the lines are due to hydrogen, and others to substances not yet recognised in terrestrial chemistry.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "bright lines" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
