Elementary treatise on physics, experimental and applied : for the use of colleges and schools (1906)
Ganot, A. (Adolphe), 1804-1887, Atkinson, Edmund, 1831-1901, Reinold, A. W. (Arnold William), 1843-1921 · New York : Wood · leaf 690
from F,, the otherfrom F., : thus the point H is illuminated by two rays, as also are K and I. Now the combinedaction of these twopencils is to form aseries of parallelbands alternatelyred and black on thescreen(fig.642). Theyare distributed sym-metrically in refer-ence to one of them£T, which is…
Physics
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