Cellular phones use radio-waves in which band?

Option 2 : ultra high frequency

CONCEPT:

• A wave is defined as a disturbance or variation that transfers energy progressively from point to point in a medium.

Electromagnetic waves:

• Electromagnetic waves are formed when an electric field comes in contact with a magnetic field.
• They are deflected neither by the electric field nor by the magnetic field.
• Electromagnetic waves do not need any object medium for propagation and can easily travel through the vacuum.

Radio Wave:

• Radio waves are a type of electromagnetic radiation best-known for their use in communication technologies, such as television, mobile phones, and radios.
• These devices receive radio waves and convert them to mechanical vibrations in the speaker to create sound waves.
• Radio waves have frequencies as high as 300 gigahertz to as low as 30 hertz.
• Radio waves have the longest wavelengths in the electromagnetic spectrum.

EXPLANATION:

• Radio waves are electromagnetic waves.
• Radio waves are used for television, cellular phones and radios.
• Radio waves have frequencies as high as 300 gigahertz to as low as 30 hertz.
• Typical frequency range for cellular phones is 900 MHz to 1800 MHz which comes in ultra high frequency range.