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Discovering Electromagnetic Waves

Vibration & Waves

★Exhibit Content: Emission, reception, and propagation of electromagnetic waves ★Interaction: Electromechanical interaction ★Operation: 1. Press the start button to activate the electromagnetic wave transmitter; 2. Push the joystick left and right to control the distance between the copper ring and the electromagnetic wave transmitter, and observe the brightness of the bulb (neon bulb). ★Exhibit Description: "Discovering Electromagnetic Waves" is an interactive exhibit for science popularization of electromagnetics, designed for physics science exhibition areas, and is also a recommended exhibit of PopsciCat Exhibit Store. The exhibit simulates the experiment of scientist Hertz, reproducing the emission and reception process of electromagnetic waves. The main devices are enclosed in a transparent protective cover, with the core consisting of an electromagnetic wave transmitter and a copper ring (receiver) embedded with a neon bulb. Visitors press the start button, the electromagnetic wave transmitter begins to work, and push the joystick to control the distance between the copper ring and the transmitter. When the position is appropriate, the neon bulb in the center of the copper ring lights up, visually demonstrating the reception effect of electromagnetic waves. ★Scientific Principle: Electromagnetic waves are oscillating particle waves emitted by in-phase oscillating and mutually perpendicular electric and magnetic fields derived in space, propagating in wave form, and their intensity is inversely proportional to the square of the distance. The closed loop formed by the copper ring and the bulb acts as an electromagnetic wave receiver. Under the action of electromagnetic waves, an induced current is generated, causing the bulb to light up; the closer the distance, the stronger the induced current, and the brighter the bulb, and vice versa. Through simulated experiments, this exhibit allows visitors to intuitively understand the emission, reception, and propagation characteristics of electromagnetic waves, recreating the discovery process of electromagnetic waves.

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Principle Display: ★★★★ Interaction Effect: ★★★★ Ease of Installation: ★★★★★ Durability: ★★★★ Overall Rating: ★★★★

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