An Interesting Discovery in Science

Feilding Star, Volume VIII, Issue 51, 9 October 1886, Page 4

An Interesting Discovery in Science

■ ■ — -v— — — — - One of the most interesting recent discoveries in science is the fact that » ray of light produces sound. A Bunbeam is thrown through a lens on a glass vessel that contains lampblack c loured silk or worsted, or other substances. A disk, having slits or openings out in it, is mad© to revolve Bwif tly in this beam of light, so as to cut it up thus making alternate flashes of light and shadow. On putting the ear to the glass vessel sti ange sounds are heard so long as the flashing beam is falling on the vessel. Recently a more wonderful discovery has been made. The beam of sunlight is made to pass through a prism so as to produce what is called the ; solar spectrum or rainbow. ' The' disc Is turned and the coloured light of the rainbow is made td break through it. Now place the ear to the iyegse,l, containing the silk; wool, or, other material. As. the coloured lights ef the spectrum, and there will be silence in other parts. For instance, if the vessel contains red worsted and the green light flashes ■upon it loud sounds will be given. Only feeble sounds will be heard i when the red and blue parts of the! rainbow a 1 upon the vessel, and other eblours make no sounds at all. Green silk gives sound best in red light. Every kind of material gives more or less sound in different colours and utters no sound in others.