Exciting work going on in acoustics!” says the referee. “The acoustic metamaterials you describe sound amazing and I am really looking forward to finding out more about them!” Then, Team Sound plays their trump card: “We believe that acoustic metamaterials will even give us silent hospitals and offices!” Everyone starts clapping. With the scores standing at three-all, the referee concludes, “We will definitely need a re-match in a few years’ time. Congratulations to both teams for all your fantastic work!.
Which team do you think might come up with the next great invention? Perhaps you will decide the winner one day! Glossary Wavelength: ↑ This is the distance Spain phone number list between two following peaks (or troughs) in a wave. It is typically used as unit of scale to decide how big are the objects compared to the wave. While for visible light the wavelength is very small, smaller than the smallest hair, the wavelength of the sounds we can hear varies between about 1.7 cm and 1.7 meters. It is worth noting that each primary color has its own wavelength. More on this on the article “A Science Busker Guide to sound”. Interference: ↑ This is a phenomenon that happens when two waves of the same frequency overlap in the same location. This is a phenomenon that happens when two waves of the same frequency overlap in the same location.
In a nutshell, if their peaks and troughs are in the same location at the same time, they add up…and a louder sound is obtained. Otherwise, they cancel out. More on interference in the article “A Science Busker Guide to sound” and on BBC Bitesize. Two-slit Experiment: ↑ Imagine a source of red light (on the left) in front of a screen with two vertical slits (in the middle). Light passes through the slits and we observe it on a screen on the right. When a single slit is open, on the screen appears a spot of light. When the two slits are both open, on the screen appears a pattern of lines, alternating dark and light.