Musical Flames
المؤلف:
GEORGE A. HOADLEY
المصدر:
ESSENTIALS OF PHYSICS
الجزء والصفحة:
P-233
2025-11-20
19
The air in a tube may be thrown into sound vibrations by means of a small lame.
Demonstration. - Procure a glass tube about 8 mm. in diameter and about 20 cm. long and draw it down to a small jet. Bend this tube at right angles and fasten it to a small board with a wire staple. Place this under a tripod covered with wire gauze, as shown in Fig. 1. Turn on the gas and light it above the gauze. Regulate the position of the glass tube and the pressure of the gas until you have a flickering blue flame, broad at the base and pointed at the top. Place over this a tube 5 cm. in diameter and of almost any length, and it will at once give out a loud musical tone. Compare the pitches given by tubes of different lengths.
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