Show THE SOUND OF A SUNBEAM A wonderful scientific fact that was tta dis e d only a short time ago one of the most wonderful disco discoveries venes in science that has been made within the last year or two is the fact that a beam of light produces sound says pearsons weekly A beam of sunlight is thrown through a lens on a glass vessel that contains lampblack colored silk or worsted or other substances A disk having slits gropen or openings cut in it is made to revolve swiftly in this beamon beam of light so as to cut it up thus making alte alternate rn a to flashes of light and shadow on p putting ut the ear to the glass vessel strange sounds are h heard ca rd so long as the flashing beam is falli falling ng on the vessel recently a more wonderful discovery aas has been made A beam of sunlight is is caused to pass through a prism so as to produce what is ia called the solar spectrum or rainbow the disk is turned and the colored light of the rainbow is made to break through it now place the ear to the vessel containing the silk wool or other material As the colored lights of the spectrum fall upon it sounds will n ill be given by different parts of 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 if the red and blue parts of the rainbow fall upon the vessel and other colors colon make no so sound und at all green silk gives sounds best in a ared red light every kin hinss material gives more or less les a sound found i erent colors and utters n no sound d ino i in 0 others em C |