We all have been tortured by the lessons of physics. But as physics is a culmination of natural things, we can not run far from it. It is in our daily lives and we can not avoid these. Such two phenomenons are sound waves and light waves. Both are inseparable from our lives, and this is why we should have certain ideas about the difference between the two.
References
- https://link.springer.com/article/10.1007/BF03035840
- https://link.springer.com/content/pdf/10.1007/BF03046242.pdf