A beam of luminous hydrogen canal rays has, owing to its velocity, exactly the same direction as that of the electric field in which it may be made to move. Johannes Stark
A colour is a physical object as soon as we consider its dependence, for instance, upon its luminous source, upon other colours, upon temperatures, upon spaces, and so forth. Ernst Mach
At sunrise everything is luminous but not clear. It is those we live with and love and should know who elude us. You can love completely without complete understanding. Norman Maclean
For marketing purposes, the luminous flux of projectors that have been tested according to this procedure may be quoted in "ANSI lumens", to distinguish them from those tested by other methods.
If a light source emits one candela of luminous intensity uniformly across a solid angle of one steradian, its total luminous flux emitted into that angle is one lumen.
It is a good rule never to see or talk to the man whose words have wrung your heart, or helped it, just as it is wise not to look down too closely at the luminous glow which sometimes shines on your path on a summer night, if you would not see the ugly worm below. Rebecca H. Davis
Life is not a series of gig lamps symmetrically arranged; life is a luminous halo, a semi-transparent envelope surrounding us from the beginning of consciousness to the end. Virginia Woolf
No one with a body full of aliments can have a luminous soul and other intellectual faculties. It is necessary to care for the body if we wish the spirit to function normally. Michael Servetus
Religion must completely encircle the spirit of ethical man like his element, and this luminous chaos of divine thoughts and feelings is called enthusiasm. Karl Wilhelm Friedrich Schlegel
Strange to say, the luminous world is the invisible world; the luminous world is that which we do not see. Our eyes of flesh see only night. Victor Hugo
