Ultrasonic Grating Apparatus is a unique demonstration of the interaction of longitudinal sound waves and transverse light waves and also a method for the precise determination of the speed of sound in liquids.
This item can only be shipped to schools, museums and science centers
Product Details
The Ultrasonic Grating Apparatus is both a unique demonstration of the interaction of longitudinal sound waves and transverse light waves and also a method for the precise determination of the speed of sound in liquids. Distilled water and ethanol are suitable starting liquids. The core of this apparatus is a parallel-sided glass tank that houses the liquid sample and contains a lead zirconate titantate ultrasonic transducer. Resonances can be found to set up a standing wave field in the liquid, which results in a periodic variation of the liquid’s refractive index along the tank. If a parallel light beam is shone through the tank normally to the standing wave field, the liquid acts as a diffraction grating, producing fringes that can be measured with a micrometer eyepiece. In practice, the eyepiece is focused on the source slit and the exciting RF frequency is adjusted until the interference fringes appear.
Contents include: • Optical bench, 1,000 mm • Riders (lateral adjustment and plain) • Micrometer eyepiece, eyepiece adapter ring and eyepiece holder • Glass tank for HF grating • HF generator and frame • Optical table • Lenses and lens holder • Mercury lamp, 20 W, 110 V
1-800-452-1261
