Sketch of Prof. John Le Conte ; [and] Sensitive flames and sound-shadows (1889)
Stevens, W. Le Conte (Walter Le Conte), 1847-1927 · New York : D. Appleton · leaf 30
hin the shadow ofthe disk; but, by moving the latter to and fro, one position isfound where it causes the flame to be violently agitated by themeeting of waves diffracted at the edge of the circle. The diffract-ive effect is the same as if the impervious disk were a lens con-verging the sound-waves… … s Fio. 8 4 3 > * 9 1 J^ f S ^ Hyperbolas prodfced by Interfebencb of Waves. 24 SENSITIVE FLAMES AND SOUND-SHADOWS. grating is made is beyond the scope of the present paper.* As-suming its use, the sensitive flame enables us to detect a focalarea of noise, at which the flame is violently…
LeConte, John, 1818-1891 · Sound-waves
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
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