A study of the propagation, refraction, reflection, interference and diffraction of ripple waves . 13. Photograph No. bar at the left of the picture. Ill MANIPULATIONThe usual procedure after filling the tank to a r>ept>^ of aboutone cm. with ordinary tap water strained through several thicknessesof cheese cloth, was to start the motor and then adjust the lightuntil the surface of the water around the generating tube was evenly-lighted . The air pressure was then turned on. Final adjustmentswere made by varying the position of the tube above the water, thespeed of the mot
A study of the propagation, refraction, reflection, interference and diffraction of ripple waves . 13. Photograph No. bar at the left of the picture. Ill MANIPULATIONThe usual procedure after filling the tank to a r>ept>^ of aboutone cm. with ordinary tap water strained through several thicknessesof cheese cloth, was to start the motor and then adjust the lightuntil the surface of the water around the generating tube was evenly-lighted . The air pressure was then turned on. Final adjustmentswere made by varying the position of the tube above the water, thespeed of the motor, and the amount of air pressure, until a good pat-tern of ripples was produced. Every time the disc rotated the airpressure and the beam of light were cut off isoperiodically, and asthe small ripples started out from the source they were illuminatedat equal intervals and therefore the pattern on the ground glass scree .appeared stationary. It was found that ripples of small amplitudes 17 could best be formed when the end of the generating tube just touchedthe liquid, but that for ripples of lar
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttheses, booksubjectwa
