Have you ever wondered why cell phones can make wireless calls and why WiFi can penetrate walls? All of this is inseparable from the invisible physical phenomenon of electromagnetic waves. Electromagnetic waves are a form of energy propagation formed by the interaction of changing electric and magnetic fields. They can propagate in a vacuum without a medium, reaching an astonishing speed of 300,000 kilometers per second. From the radio waves we use to X-rays in medicine, electromagnetic waves of different frequencies form the cornerstone of modern technology. Our interactive installation, "Discover Electromagnetic Waves" (1400*800*1200mm), is designed to make this abstract concept tangible. When visitors hold the handles on both sides and rotate them, the device generates electromagnetic wave signals of corresponding frequencies in real time. A visual lighting system intuitively presents the wavelength, amplitude, and other parameters of the electromagnetic waves. As the operating fre
