The frequency from 3 to MHz is known as (A) Audio band (B) Medium frequency band (C) Very high f

step 1 As we know that, as we know that the frequency from the frequency from the frequency from 3MHZ t

The frequency from 3 to MHz is known as (A) Audio band (B)...

Key Concepts

Electromagnetic Spectrum

The electromagnetic spectrum encompasses all types of electromagnetic radiation, ranging from very low frequencies like radio waves to very high frequencies such as gamma rays. It is the fundamental concept behind the study of radiated energy, which includes visible light, infrared, ultraviolet, and radio waves, all distinguished by their frequency and wavelength.

Radio Frequency Bands

Radio frequency bands segment the electromagnetic spectrum into ranges that are used for different types of communication and other applications. These bands are defined by their frequency ranges, and each band exhibits unique propagation characteristics and technological uses. Understanding these bands is essential for both the design and regulation of communication systems.

High Frequency (HF) Band

The High Frequency (HF) band is defined by the frequency range from 3 MHz to 30 MHz. This band is widely used for long-distance communication, including amateur radio, international broadcasting, and over-the-horizon radar, due to its ability to reflect off the ionosphere, facilitating long-range signal propagation.

Medium Frequency (MF) Band

The Medium Frequency (MF) band covers the frequency range from 300 kHz to 3 MHz. This band is frequently used for AM broadcasting and certain navigation signals. Its propagation characteristics make it suitable for regional broadcasting, where signals follow the curvature of the Earth fairly well during daytime conditions.

Audio Frequency

Audio frequency refers to the range of frequencies that can be perceived by the human ear, generally from about 20 Hz to 20 kHz. Although not part of the radio frequency electromagnetic spectrum used for over-the-air communication, understanding the audio band is important in contexts like sound engineering and audio signal processing.

Please give Ace some feedback