xxi. p. 143, misrepresents, of course unintentionally, certain remarks of mine upon “dark” spectrum lines. I have not, and never have had, the slightest doubt that the dark lines of the solar ...
The principal feature noticeable in the spectra is the appearance ... most prominent of these lines have been marked with their respective . frequency shifts in wave-numbers from the exciting ...
Electromagnetic waves travel at 300,000,000 metres per second (m/s) through a vacuum. Often a phrase is used to help remember the order of the groups of the electromagnetic spectrum such as Roman ...
Studying the line spectra produced by hot gases and absorbed by cooler gases allows us to identify the elements in stars. When a gas is very hot, it doesn’t emit all wavelengths of light.
The wave length of M. Angstrom's bright line ... that the same line is not always the brightest; lastly, that one line in the spectrum of Aurora is coincident with a dark line, which appears ...
Prominences (large, bright feature extending outwards from the sun’s surface) gave a bright line spectrum, proving that they are gaseous in nature. Helium was discovered in the sun in 1869 and a ...
There's lots to discover in the electromagnetic spectrum. Here's a tour that begins with radio waves and takes you through microwaves, infrared radiation, light, ultraviolet radiation, and X-rays.