Name the Waves Which Are Used in Sonar to Find the Depth of Sea.

Name the waves which are used in sonar to find the depth of sea.

एक पंक्ति में उत्तर

Ultrasonic waves are sent in sonar to find the depth of the sea.

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अध्याय 3: Sound - Exercise 3.1 ii [पृष्ठ १३६]

अध्याय 3 Sound
Exercise 3.1 ii | Q 32 | पृष्ठ १३६

Displacement distance graph of two sound waves A and B, travelling in a medium, are as shown in the diagram below.

Study the two sound waves and compare their:

1) Amplitudes

2) Wavelengths

Define frequency term in relation to a wave.

What adjustments would you make for tuning a stringed instrument for it to emit a note of a desired frequency?

What is the shape of a soundboard kept behind the speaker on the stage of a big hall ?

What is a bulb horn ? Name the principle on which a bulb horn works.

What is a soundboard ? Explain the working of a soundboard with the help of a labelled diagram.

Write the approximate value of the speed of sound in iron.

Draw a diagram representing a wave of amplitude 4 cm and wavelength 2 m. If the frequency of the wave is 150 Hz, calculate its velocity.