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1. Light Light was regarded formerly as consisting of material particles, or corpuscules, sent off in all directions from luminous bodies, and traversing space, in right lines, with the known velocity of about 186,300 miles per second; but it is now generally understood to consist, not in any actual transmission of particles or substance, but in the propagation of vibrations or undulations in a subtile, elastic medium, or ether, assumed to pervade all space, and to be thus set in vibratory motion by the action of luminous bodies, as the atmosphere is by sonorous bodies. This view of the nature of light is known as the undulatory or wave theory; the other, advocated by Newton as the corpuscular, emission, or Newtonian theory. A more recent theory makes light to consist in electrical oscillations, and is known as the electro-magnetic theory of light. Then he called for a light, and sprang in.Acts xvi. 29. And God made two great lights; the greater light to rule the day, and the lesser light to rule the night.Gen. i. 16. The murderer, rising with the light, killeth the poor and needy.Job xxiv. 14. He seemed to find his way without his eyes;Shak. There were windows in three rows, and light was against light in three ranks.I Kings vii.4. O, spring to light, auspicious Babe, be born!Pope. The duke yet would have dark deeds darkly answered; he would never bring them to light.Shak. My strength faileth me; as for the light of my eyes, it also is gone from me.Ps. xxxviii. 10. He shall never knowShak. |
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