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Updated: May 14, 2025
If an object, say the hull of a vessel at sea, prevents these rays from coming to the eye, that hull, or other object, is of course clearly defined, the reason being that the iron mass shuts out the light-rays behind it. Mr.
"Nothing but red paint to stop their light-rays," he reassured her as he lifted her clear from the ground in a soul-satisfying embrace. Out of the corner of his eye he saw the Kondalians staring in open-mouthed amazement at the Skylark. Wheeling swiftly, he laughed as he saw a gigantic ball of frost and snow!
"As our observations of Earth with projected light-rays have been carried on for seven hundred years, it will be necessary to give you an outline of our history and the progress of science covering that time.
The usual explanation of the appearance of the optical image on the back inside wall of such a camera is that light-rays, emanating from every point outside, cross each other in the aperture of the camera and so again point by point create the inverted image. No such explanation, clearly, is open to us. For the world of external objects is a whole, and so is its image appearing in the camera.
The little sharply lighted and heated point to which the light-rays can be brought is the focus of the lens, and the distance it lies behind the lens is called the focal distance. The thicker the lens, or burning-glass, is in the middle, the shorter its focal distance, and the more strongly it will magnify.
Nowadays we triumph in our so-called 'discoveries' of wireless telegraphy and telephony, light-rays and other marvels but these powers have always been with us from the beginning of things, it is we, we only, who have refused to accept them as facts of the universe. Let us talk no more about it! Stupidity is the only thing that moves me to despair!"
The artillery was moved down to a point near the Wyoming State line, about fifteen miles directly north of the Mercutian camp. Six days before this, forty-eight hours after I had returned to Billings, observation planes had reported the establishment of two more light-rays, similar in appearance to the first. During the succeeding days others rapidly appeared.
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