Question

Which two technologies use reflected sound waves​

Answer 1

Answer:

looh. If you have ever heard an echo, you'll be familiar with the basic principle behind three similar technologies: radar, sonar and lidar. An echo is the reflection of sound waves off of some distant object.

Explanation:

From Goog|e

Answer 2

Answer:

Sonar and Ultrasound are reflected sound wave technologies.

Explanation:

Sonar- is a technology that was developed by the U.S. Navy to navigate and detect underwater objects. A ship emits a sound wave in the direction of a certain object. It then measures the amount of time it takes the sound wave to return. Knowing how fast a sound wave travels lets you calculate how far away the object is. This technique is used to create maps of the ocean floor. It is also used to detect submarines and other submerged objects.

Ultrasound- Ultrasound devices work in a way very similar to sonar. They emit sound waves that are reflected by tissues in the body. The amount of time it takes for the reflected sound waves to return to the machine allows the machine to produce an image of a part of the body.

The reason the answer is not also radar (Although radar is a reflected sound wave), is because Radar is a radio wave. The question is asking to name reflected sound wave technologies not radio wave.

hope this helps