Gilbert light experiments for boys . or refracted more than thelonger waves and as a resultthe white light is spread outinto the spectrum. Thisspreading of light is calleddispersion. Pig. 143. The waves destroy each otheror interfere. INTERFERENCE Spectrum by Reflection. Another beautiful methodof producing a spectrum isillustrated in Fig. 142. Amirror is placed in a slant-ing position under water ina pan and a beam of sunlightis allowed to fall on the mir-ror. The sunlight, in goingthrough the water to the mirror and back, really passes through a prism of water and it isspread out or disperse
Gilbert light experiments for boys . or refracted more than thelonger waves and as a resultthe white light is spread outinto the spectrum. Thisspreading of light is calleddispersion. Pig. 143. The waves destroy each otheror interfere. INTERFERENCE Spectrum by Reflection. Another beautiful methodof producing a spectrum isillustrated in Fig. 142. Amirror is placed in a slant-ing position under water ina pan and a beam of sunlightis allowed to fall on the mir-ror. The sunlight, in goingthrough the water to the mirror and back, really passes through a prism of water and it isspread out or dispersed into a beautiful spectrum. If, after the spectrum is formed, the surface of the water isstirred, the colors of the spectrum are mixed and the reflectedbeam is white. This proves again that white light is made upof all the colors of the spectrum. Interference. In a water wave the particles of water simplymove up and down, but the wave moves forward. A wave lengthis a hill and a hollow. If, now, two waves of exactly the same length come togetherin such a way that one is one-half wave behind the other (), the hill of one coincides with the hollow of the other, theparticles of water do not move at all, and one wave destro
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscientificrecreation
