Question

Which of the following is not an application of ultrasound waves?

A.)

B.)

C.)

D.)

Answer 1

s it is easy to answer to solve the question because this question includes objects which we see in our daily life. Of course not bats but we know that they use ultrasounds waves to detect their path. But stethoscopes are only used for detecting the sound waves of heart beats and similar sounds from our bodies.

Complete answer:
Ultrasound waves: These are the sound waves which have higher frequencies than the frequency of the normal sound. These cannot be listened to by a normal human being. To be precise these frequencies can be heard by bats but not humans. This makes the ultrasound waves similar to normal sounds because bats can hear it.

Stethoscope: We must have seen a stethoscope many times in our lives. It is used by a doctor to listen to the internal sounds of not only humans but also animals, especially heart beats. These beats work similar to ultrasound waves which get reflected by the internal organs of our bodies. Since, we cannot apply it to hear the sound of the outer world so; this is not an application of ultrasound waves.
On the other hand, there are uses of ultrasound waves in bats, metal blocks and feathers.

So, the correct answer is “Option A”.

Note:
To solve this question we will use the following points which are as follows.
(1) We can clearly see that there is no use of ultrasound waves in stethoscopes because it is only used for detecting the sound of lungs inside humans.
(2) But we can use ultrasound waves for detecting weather, and checking metal blocks.
(3) These types of questions are solved on the basis of today 's knowledge.
(4) We also use ultrasound waves for refining metals.