A new concave ultrasonic diffraction grating has been constructed and used in the measurement of wave-lengths between one and three millimeters. An oscillating quartz crystal is used as generator and receiver of the sound waves. Results are compared with those obtained by the Pierce interferometer and found to agree.
Proceedings of the Iowa Academy of Science
©1931 Iowa Academy of Science, Inc.
Thompson, George E.
"A Concave Ultrasonic Diffraction Grating,"
Proceedings of the Iowa Academy of Science, 38(1), 215-215.
Available at: https://scholarworks.uni.edu/pias/vol38/iss1/59