radio wave
Definition
Noun: An electromagnetic wave with a wavelength between 0.5 cm and 30,000 m, used for transmitting signals through the air without wires. Radio waves are a type of non-ionizing radiation used for communication, broadcasting, and radar.
Usage
The term "radio wave" refers to the specific physical phenomenon. It is typically used in scientific, technical, and general contexts to describe the carrier of wireless signals. * Radio waves are used to broadcast music and news. * The antenna transmits and receives radio waves. * Cell phones communicate using radio waves.
Examples
- Scientific Context: "The study focused on how the atmosphere affects the propagation of a radio wave."
- Technical Context: "The engineer tuned the receiver to the correct frequency to capture the radio wave."
- General Context: "The remote control sends a radio wave to operate the toy car."
Advanced Usage
- "to propagate": In physics, radio waves are said to propagate, meaning to travel through space or a medium.
- Radio waves propagate at the speed of light.
- "to emit": Devices are described as emitting radio waves.
- The transmitter emits a powerful radio wave.
Variants and Related Words
- Radiofrequency (RF) (n): The frequency range within the electromagnetic spectrum that corresponds to radio waves. Often used as an adjective (e.g., RF signal, RF energy).
- Electromagnetic wave (n): The broader category that includes radio waves, along with microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
- Carrier wave (n): A specific radio wave of constant frequency that is modulated (altered) to carry information.
Synonyms
- RF signal: A signal carried by radio waves.
- Wireless signal: A general term for any signal transmitted without wires, commonly using radio waves.
Related Phrases
- Radio wave spectrum: The portion of the electromagnetic spectrum occupied by radio waves.
- Radio wave transmission: The act or process of sending signals via radio waves.
Noun
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an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m
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