Based on my understanding, wireless signals are lights. Why can I use my gadgets inside a room?
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Wireless signals are not light. Light is a form of wireless signal though.
Both light and radio are electromagnetic waves. Different frequencies gave different properties. Visible light, microwave, xray, gamma, ultraviolet, infrared all are the same thing, radiation but with different properties resulting from the frequency and power. Essentially a energy wave from some sort either natural or man made source of power.
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