There are several frequencies used in various fields and applications. Here are some commonly known frequencies:
Radio Frequencies: These frequencies are used for radio communication, broadcasting, and wireless transmission. They range from very low frequencies (VLF) below 30 kHz to extremely high frequencies (EHF) above 30 GHz.
Television Frequencies: Television signals are typically broadcasted in Very High Frequency (VHF) and Ultra High Frequency (UHF) bands. VHF frequencies range from 30 MHz to 300 MHz, while UHF frequencies range from 300 MHz to 3 GHz.
Cellular Frequencies: Mobile phones and cellular networks operate on specific frequency bands, depending on the technology used. Common bands include GSM (900 MHz and 1800 MHz), CDMA (800 MHz), and LTE (700 MHz, 1700-2100 MHz, and 2500-2700 MHz).
Wi-Fi Frequencies: Wireless local area networks (WLAN) use frequencies in the 2.4 GHz and 5 GHz bands. The 2.4 GHz band is divided into several channels, while the 5 GHz band offers more available channels with less interference.
Bluetooth Frequencies: Bluetooth technology operates in the 2.4 GHz frequency range and uses multiple channels within that spectrum for wireless communication between devices.
GPS Frequencies: The Global Positioning System (GPS) uses radio frequencies in the L-band, specifically around 1.5 GHz (L1) and 1.2 GHz (L2), for satellite-based navigation and positioning.
Microwave Frequencies: Microwaves, which are commonly used for cooking and communication, operate in the 2.4 GHz and 5.8 GHz bands. These frequencies are also utilized in radar systems and satellite communications.
Infrared Frequencies: Infrared (IR) radiation has frequencies ranging from 300 GHz to 400 THz. It is commonly used for remote controls, infrared data transfer, and some forms of wireless communication.
Visible Light Frequencies: Visible light is the range of frequencies detectable by the human eye, approximately 430 THz (red light) to 750 THz (violet light).
These are just a few examples of the many frequencies utilized in different applications. The specific frequency used depends on the technology, purpose, and regulations governing the particular field.
