Question

write any 2 applications of the following
1. ultra sonic waves
2. multiple reflection
3. sonar

Answer 1

Ultrasonic devices are used to detect objects and measure distances. Ultrasound imaging or sonography is often used in medicine. In the nondestructive testing of products and structures, ultrasound is used to detect invisible flaws.

Answer 2

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ULTRASONIC WAVES :-

1. ultrasonic devices are used to detect objects and measure the distances .
2. Ultrasound imaging or sonography is often used in medicine .

MULTIPLE REFLECTION :-

1. multiple reflection is often used in devices such as loud speakers , sound boards etc .
2. multiple reflection is used in kaleidescope by using plane mirrors to get beautiful patterns .
3. In stethoscope the sound of patient's heartbeat reaches the doctor's ear due to multiple reflection .

SONAR ( sound navigation and ranging ) :-

1. It is used in military equipments to detect bombs , missiles .
2. To navigate under ice .

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