Question

Which of the following is true for the ultrasonic waves?

a. They have high energy content

b. They can be transmitted over large distances

c. They undergo reflection, refraction and absorption

d. All of these.
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Answer 1

Answer:

(d) all of these

Explanation:

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Answer 2

Answer:

The correct answer is All of these .

Explanation:

• They have high energy content . They can be transmitted over large distances. They undergo reflection, refraction and absorption
  The all option given above are correct.

• Ultrasonic wave is the type of longitudinal wave whose frequencies lies above the upper limit of the audible range. The audible range is 20 KHz. Therefore, the ultrasonic waves should have more than 20 Hz range.
• The humans can hear ultrasonic waves because it has the frequency greater than the audible range for humans.
• Ultrasonic waves cannot travel through the vacuum.
• Ultrasonic waves has very high penetrating power, because they have very small wavelength.
  
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