<code></code>Hello to all members of the Hive community. I shared this position with you to give a simple description of the waves that make up the school program I teach in high school. This concept seems abstract to our students, but in truth, it is present in several areas that I will cite a few.

****
****

# 1) Electromagnetic waves
<code></code>On the one hand, these waves have facilitated technological communication and its progression, which translates into the transport of information. Plus for medical diagnostics.

<code><code><code><code><code><code><code><code><code></code></code></code></code></code></code></code></code></code>![image.png](https://images.ecency.com/DQmd61ZFfjiBD6Unc7BBToxCePXnJ4cTAXSyRQm6z9wHVSB/image.png)

<code><code><code><code><code><code><code><code><code></code></code></code></code></code></code></code></code></code>[Source](https://www.google.tn/search?q=effet+des+ondes+sur+la+sant%C3%A9&sxsrf=AOaemvKucLazkd6Slwj-oLIanoGqZKMajg:1642427488095&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjvzfyX97j1AhXtDmMBHfowCXEQ_AUoAXoECAEQAw&biw=1366&bih=657&dpr=1#imgrc=DkV2Xa70nO1LAM&imgdii=3SavD9Qrm_k8-M)



<code><code><code></code></code></code>![image.png](https://images.ecency.com/DQmWQmUQxKu4EXAQj7bhQUMEZB896Uy9NELwbVwrLJ8u8NP/image.png)
<code><code><code></code></code></code>[Source](https://www.ladepeche.fr/article/2011/06/01/1096303-le-telephone-portable-ses-risques-comment-s-en-servir.html)




****
<code></code>On the other hand, these effects are sometimes destructive, and this is based on scientific research which assumes that they can be the cause of cancers (use of laptops for example).

![image.png](https://images.ecency.com/DQmajcavb5FUioMJL7uEQ6DJVAFcnBZgcwYoQs7XJtJBy6p/image.png)

[Source](https://www.cea.fr/comprendre/Pages/physique-chimie/essentiel-sur-ondes-electromagnetiques-communication.aspx#:~:text=Les%20ondes%20%C3%A9lectromagn%C3%A9tiques%20transportent%20de,le%20domaine%20de%20la%20communication.&text=De%20m%C3%AAme%2C%20la%20lumi%C3%A8re%20visible,permet%20de%20voir%20les%20couleurs.)


# 2 ) Mechanical waves
* ## Seismic waves: 
their origin is a vibratory movement of the rocks at the bottom of the earth and is manifested by earthquakes at the surface.

![image.png](https://images.ecency.com/DQmP5P3PCy3eTX9JXDKjiNo5Z2x3CX9azJQEGUj2jwHn7Wt/image.png)

[Source](https://www.google.tn/search?q=avantages+des+ondes+m%C3%A9caniques&tbm=isch&ved=2ahUKEwjg2sCX-7j1AhVNeRoKHX8jB-IQ2-cCegQIABAA&oq=avantages+des+ondes+m%C3%A9caniques&gs_lcp=CgNpbWcQAzoHCCMQ7wMQJ1DtC1j2L2ChMmgAcAB4AIAB3AOIAecOkgEHMi43LjQtMpgBAKABAaoBC2d3cy13aXotaW1nwAEB&sclient=img&ei=kHjlYeDSM83yaf_GnJAO&bih=657&biw=1366#imgrc=c5ZJ9dNpPybXLM&imgdii=OWLdNldAhqM0tM)

![image.png](https://images.ecency.com/DQmU4bjR6vvCeaNzCp7jmgZ55oshZLzpUJYorUzhmk5Fn58/image.png)


* ## Mechanical wave on water surface: Water waves.
They result from a rapid movement of a large volume of water, its origin can be an underwater earthquake or wind. This event sometimes causes huge damage such as the tsunami.
![image.png](https://images.ecency.com/DQmPttcjE3HjTvASXyXLQZSXWRaZzHQv5SgNAR6SZeHfKuh/image.png)


[Source](https://www.google.tn/search?q=+ondes+m%C3%A9caniques+et+tsunami&tbm=isch&ved=2ahUKEwjJsfSr-7j1AhUZ5hoKHTu_D6EQ2-cCegQIABAA&oq=+ondes+m%C3%A9caniques+et+tsunami&gs_lcp=CgNpbWcQAzoECAAQQzoFCAAQgAQ6BggAEAcQHjoGCAAQCBAeOgQIABAYUP4LWOpNYOtRaABwAHgAgAGHCogBvCCSAQ0wLjguMS41LTEuMC4ymAEAoAEBqgELZ3dzLXdpei1pbWfAAQE&sclient=img&ei=u3jlYYnoJpnMa7v-vogK&bih=657&biw=1366#imgrc=ND5LPMd14NZZoM)



![image.png](https://images.ecency.com/DQmZpE8HcMU3kHfaxF4tEW1aiWBGeTJvFuFpY4cgPyWatFZ/image.png)

[Source](https://tomorrowmag.net/tsunami-la-ou-tout-se-declenche/)



* ## Sound waves.
These waves are a communication tool for some animals.

<code><code><code><code><code><code><code><code><code><code></code></code></code></code></code></code></code></code></code></code>![image.png](https://images.ecency.com/DQmbVKa7hyAoFpW9vLk4hm5HvW1zxauJR1g9uPzJwGnS2KC/image.png)


<code><code><code><code><code><code><code><code><code><code></code></code></code></code></code></code></code></code></code></code>[Source](https://www.google.tn/search?q=utilit%C3%A9%20des%20ondes%20sonores&tbm=isch&tbs=rimg:CTPVrss2uDl5YXP8HGRqMBRBsgIGCgIIABAA&hl=fr&sa=X&ved=0CBsQuIIBahcKEwiQ1pW0qLn1AhUAAAAAHQAAAAAQMQ&biw=1349&bih=600#imgrc=CAV5n35kP1YxqM&imgdii=yIlHM7D33CviZM)

******
>For man, he uses these waves in a sophisticated device: Sonar, which allows the location of objects under water for the purpose of carrying out marine mapping, listening to noise in the case of wars.

<code><code><code><code></code></code></code></code>![image.png](https://images.ecency.com/DQmSHE7PXGhxxoZLfrrKcZpKLUgHVDEwCKNj8VmjXmJWNCM/image.png)

<code><code><code><code><code><code><code><code><code><code><code></code></code></code></code></code></code></code></code></code></code></code>[Source](https://www.google.tn/search?q=sonar%20sous%20marin&tbm=isch&hl=fr&sa=X&ved=0CB4QtI8BKABqFwoTCKicx5ipufUCFQAAAAAdAAAAABAq&biw=1349&bih=600#imgrc=_A_SHgu4FPQwXM&imgdii=7G4D-YbskHX4DM)

*****

>Modern cars also use sound waves to detect their surroundings.
<code><code><code></code></code></code>![image.png](https://images.ecency.com/DQmefKRhTHsskFeYmGfgY65rgtavwfhao8S3iVnzjX5UFLn/image.png)

<code><code><code><code><code><code><code></code></code></code></code></code></code></code>[Source](http://www.billeco.com/les-sonars.html)

## *Finally, I thank you for reading this article and commenting on it.*