An Introduction to Natural Philosophy: Illustrated with Copper Plates; by William Nicholson, Volume 1 |
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An Introduction to Natural Philosophy, Vol. 1 of 2 (Classic Reprint) William Nicholson No preview available - 2017 |
An Introduction to Natural Philosophy, Vol. 1 of 2 (Classic Reprint) William Nicholson No preview available - 2018 |
Common terms and phrases
alfo alſo angle apparent magnitude appear axis becauſe bodies cafe caufe cauſe centripetal force circle colours confequently confiderable convex convex lens courſe defcribed deſtroyed diameter diminiſhed direction diſtance Earth ecliptic equal faid fame fecond feen fhadow fhewn fhould fide fimilar fince firſt fituated fmall folar fome fpace fquare ftars fuch fufficient fuppofed furface glafs glaſs gravity greater greateſt incident inclined plane increaſe inferior planet inftance inftruments inſtead interfecting inverſely itſelf Jupiter laft laſt lefs lens leſs likewife meaſure Moon Moon's moſt motion move muft muſt node obferved object occafion oppofition orbit paffes paffing parallax parallel paſs perpendicular planets pofition proportion purpoſe quantity ratio rays of light reaſon reflection refraction refrangible reft repreſent retrograde motion revolve ſeen ſmall ſpace ſtars Sun's Suppoſe teleſcope thefe theſe thickneſs thofe thoſe tion uſed velocity Venus Whence whofe whoſe
Popular passages
Page 289 - ... hot; that the vibrations thus excited are propagated in the refracting or reflecting medium or substance, much after the manner that vibrations are propagated in the air for causing sound, and move faster than the rays so as to overtake them; and that when any ray is in that part of the vibration which conspires with its motion, it easily breaks through a refracting surface, but when it is in the contrary part of the vibration which impedes its motion, it is easily reflected...
Page 276 - F, and ftrike the fenfes with the intermediate Colours in the order which their degrees of refrangibility require , that is, in the progrefs from E to F, or from the infide of the Bow to the outfide in this order, violet, indico, blue, green, yellow,orange, red.
Page 277 - Thus (hall there be made two Bows of Colours, an interior and ftronger, by one reflexion in the Drops, and an exterior and fainter by two ; for the Light becomes fainter by every reflexion.
Page 271 - The instance of the separation of the primary colours of light, which seems most remarkable, is that of the RAINBOW. It is formed, in general, by the reflection of the rays of the sun's light from the drops of falling rain, though frequently it appears among the waves of the sea, whose heads, or tops, are blown by the wind into small drops, and it is sometimes seen on the ground, when the sun shines on a very thick dew.
Page 276 - Eye, and thereby ftrike the fenfes with the deepeft violet Colour in that region. And in like manner the Angle SFO being equal ta the Angle P OF, or 42 deg.
Page 294 - Feathers of fome Birds, and particularly thofe of Peacocks Tails, do, in the very fame part of the Feather, appear of feveral Colours in feveral Pofitions of the Eye, after the very fame manner that thin Plates...
Page 303 - Room be fucceffively caft on a fecond Prifm placed at a greater diftance from the former, in fuch -manner that they are all alike incident upon it, the fecond Prifm may be fo inclined to the incident Rays, that thofe which are of a blue Colour fhall be all reflected by it, and yet thofe of a red Colour pretty copioufly tranfmitted. Now if the...
Page 305 - Were the rays of light reflected " by impinging on the folid parts of bodies, their re" flexions from polifhed bodies could not be fo re" gular as they are ; for in polifhing glafs with fa'nd, " putty, or tripoly, it is not to be imagined, that " thofe fubftances can, by grating and fretting the " glafs, bring all its leaft particles to an accurate po...
Page 297 - Head, whose breadth was but the 2Soth part of an Inch, being held in this Light, at the distance of about twelve Feet from the Hole, did...
Page 296 - GRIMALDO has inform'd us, that if a beam of the Sun's Light be let into a dark Room through a very small hole, the Shadows of things in this Light will be larger than they ought to be if the Rays went on by the Bodies in straight Lines , and that these Shadows have three parallel Fringes, Bands or Ranks of colour'd Light adjacent to them.