The creation of metamaterials will also allow scientists to take their research further and extend "the degrees of freedom to manipulate waves," Shixiong Yin, one of the study's lead authors, told Science Alert. Understanding the behavior of electromagnetic radiation can lead to innovations "including wireless communications and new small, low-energy computers," said The Independent. The phenomenon "can shift the frequency" of electromagnetic waves "in ways technology could exploit across varied fields like imaging, analog computing, and optical filtering," Science Alert wrote.įrom radio and TV waves to microwaves, we use electromagnetic waves a lot in our daily lives. Free for commercial use High Quality Images. 90000+ Vectors, Stock Photos & PSD files. Why are researchers interested in time reflections? Find & Download Free Graphic Resources for Colorful Sound Wave. The switches were triggered at the same time, creating "conditions to change the material's properties in time both abruptly and with a large contrast," The Independent said.Īs a result, a large portion of the signals were "instantaneously time reversed and frequency converted," reported SciTech Daily. The researchers sent "broadband signals into a strip of metal filled with electronic switches that were connected to reservoir capacitors," explained Popular Mechanics. In this study, the metamaterials allowed elements to be "abruptly added or subtracted through fast switches," Gengyu Xu, one of the paper's authors, told SciTech Daily. To create the phenomenon in a lab, researchers had to make a special "metamaterial," which is a material "designed to interact with electromagnetic radiation," explained Nature. Two colors placed next to each other would have the same effect as two notes. This allows us to visualize, for example, the Fourier transform, or any other wave-based electrical signal, visually. When color is blended, each color loses its individuality and a new color results. Here we see a simple example in which I have used color to show electrical waves. How did scientists observe time reflections? The basic idea is to use color to represent waves, such as sound waves. Remember that these high-quality images are free for commercial use. They were never observed because doing so "requires changing the properties of a material quickly and substantially," explained The Independent. 500+ Colorful Sound Wave Pictures Find & Download the most popular Colorful Sound Wave Photos on Freepik Free for commercial use High Quality Images Over 21 Million Stock Photos You can find & download the most popular Colorful Sound Wave Photos on Freepik. A time reflection is "like listening to a tape on rewind - which is to say fast and high-pitched," Popular Mechanics said.įor at least 60 years, time reflections have been little more than scientific theory. They also involve a wave reversal, which is when "the end of a signal is reflected first, so that we hear the signal backwards," IFL Science added. This is similar to the Doppler Effect, when an object's pitch changes as it moves, like "the changing pitch of police and ambulance sirens" as they drive past you. Time reflections involve a frequency shift, which is when "wavelengths are stretched or contracted," explained IFL Science.
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