Laser Diode for the Debye-Sears Effect

The Laser Diodes are for use in demonstrations of the Debye-Sears Effect and connect to the test vessel. Supplied with a 1 metre lead and barrel connector for connecting to the Ultrasonic CW Generator. All lasers have been measured to determine their wavelength specifically and the results are logged.

THE DEBYE-SEARS EFFECT

In 1932, Debye and Sears for the first time demonstrated the refraction of light as it passed through a liquid being subjected to high-frequency vibrations. In this process, the density maxima and minima of a stationary ultrasonic wave act like the elements of an optical diffraction grating. The grating constant here is equal to half the wavelength and therefore dependent on the frequency and speed of the ultrasonic waves transmitted through the medium (e.g. water, glycerin, oil).

Specifications

Red Diode:

• Protection classification II
• Wavelength: approx. 650nm
• Power: <1mW
• Supply voltage: 3 V DC
• Current consumption: max. 30mA
• Dimensions: 90mm x 17mm diameter

Green Diode:

• Protection classification IIIa
• Wavelength: approx. 532nm
• Power: <5mW
• Supply voltage: 3V DC
• Current consumption: max. 250 mA
• Dimensions: 90mm x 17mm diameter

Required Equipment

• P1002576 Ultrasonic CW Generator with Probe
• P1002578 Complete Test Vessel