Large field spectrographs are severely influenced by atmospheric refraction. We discuss the effect of differential refraction across the field as well as the chromatic effects for the Norris ...

Sunlight may be the bright, warming glow that heats and powers the Earth, but it's so much more than that. If you pass sunlight through a prism, you can see how it's actually composed of all the ...

WHILE in a rowing-boat on the ocean during a sultry afternoon this summer I observed a very peculiar series of refraction phenomena that seem worth describing. A thunderstorm was brewing in the ...

DURING a total eclipse of the sun there will be, as I suppose, an increase of density of the air at the central portion of the shadow. If we imagine the normal atmosphere removed, we are left with a ...