Question

11. (a) Write full form of SONAR:
(b) What is ultra sound?
(c) Write Si Unit of (i) Frequency
(ii) Wavelength
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Answer 1

1) Sound navigation and ranging

2) DescriptionUltrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is not different from "normal" sound in its physical properties, except that humans cannot hear it. This limit varies from person to person and is approximately 20 kilohertz in healthy young adults.

3) S.I unit is Hertz

S?I unit for wavelength is lambda

Answer 2

1) Sound navigation and ranging

2) DescriptionUltrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is not different from "normal" sound in its physical properties, except that humans cannot hear it. This limit varies from person to person and is approximately 20 kilohertz in healthy young adults.

3) S.I unit is Hertz

S.I. unit for wavelength is lambda