H3-12: ROARING TUBE - 4 FT
- ID Code: H3-12
- Purpose: Demonstrate standing sound waves in air excited by convection currents.
- Description:
A switch is held closed, activating a nichrome wire coil in a vertical glass tube, leading to a very loud roar at about 130 Hz, the fundamental frequency of a four-foot air tube. This is the classic Rijke tube demonstration with an electrical heater replacing a gas burner and screen as the source of the convection currents.
Consider combing this with H3-13, and invite students to make predictions about the differences in pitch and volume.
- Availability: Available
- References: https://lecdem.physics.umd.edu/images/ArchivedWebsite/services/refs/refsh.htm#H3-12
- Loc codes: FS1
- Videos-1: