INTERESTING SCIENTIFIC DISCOVERY.

Ashburton Guardian, Volume V, Issue 1369, 13 October 1886, Page 3

INTERESTING SCIENTIFIC DISCOVERY.

One of the most interesting recent dia

overics in science is the fact that a r»y of light produces sound A sunbeam is thrown through a lens on a glass vessel that contains lampblack, colored silk or worsted, or other substances. A disc, having slits or openings cut in it, is made Co revolve swiftly its this beam of light, ■ > as t . cut it up, ’bus making alternate fl jihos of light and shadow. On putting the ear to the glass vessel strange sounds are heard so long as the flashing beam is falling oa the vefssl. Recently a wonderful discovery has been made. The beam of sunlight h made to pass thr ugh a prism so ts to produce what is called the solar spectrum or nlnbow. The disc is turned and the colored light of the raiobow is made to break through it. Now placs the ear to the vessel containing the silk, wool, or other materia'. As the colored light? of the tpictrum fall upon It sound? will ba given by different pait? of the spec turn, and there will be silence in other parts For instance If the vessel cir t Ins red worsted and the green ILht flishes upon it a I md sound will be given. °nly feeble sounds will be heard when the red and blue parts of of the rainbow fall upon the vessel, and other colors made no sounds at all Green silk gives sound best in red light. Every kind of material gives more or less sound in different colors and ut'ers no sound la others.