Consider the following with regard to ultrasonic sound waves. I. They are used to measure the depth of the sea. II. They are used for sterilization of a liquid. III. They are used for removal of lamp-shoot from the chimney of factories. Which among the above is NOT an application of the ultrasonic sound wave?

Only II and III
Only I and II
Only I and III
All I, II and III are applications of ultrasonic sound waves

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 4 : All I, II and III are applications of ultrasonic sound waves

CONCEPT

Sound waves are of three types:

Infrasonic waves: The sound waves of frequency between 0 Hz to 20 Hz are called infrasonic waves. Sound produced by thunders, volcano etc. Animals like elephants and whales can hear infrasonic sounds.
Audible waves: The sound waves of frequency between 20 Hz to 20,000 Hz are called infrasonic waves. Human ear can able to listen to these frequencies
Ultrasonic waves: The sound waves of frequency above 20,000 Hz are called infrasonic waves. Many animals like bats, cats, dogs, mice etc.

EXPLANATION

The various applications of ultrasonic sound waves are:

For cleaning clothes, aeroplanes and machinery parts of clocks
For measurement of the depth of the sea
In ultrasonography
For removing lamp-shoot from the chimney of factories
In sterilization of any liquid
For sending signals

Human beings cannot detect these waves but certain creatures such as dog, cat, bat, and mosquito can detect these waves.

⇒ Option 4 is correct.

4 views Answered 2022-09-04 04:29

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