Question

Define frequency and wave length with reference to sound. Explain what to echo. Write full from of SONAR. Give anyone application of ultrasound.

Answer 1

Frequency - no of vibration in one second.
Wavelength - maximum distance between two concecutive crest or trough.
Echo- it is reflection of sound.

SONAR-sound navigation and ranging.

Ultrasound is used in medicine nd also used to detect invisible flaws.

Answer 2

hope this help you.....