Radio waves and microwaves are used in wireless communications. These types of communications include various technologies that transmit information over long distances without the need for physical wires or cables. Radio waves and microwaves are part of the electromagnetic spectrum, which encompasses a wide range of wavelengths and frequencies.

Wireless Communication:
- Wireless communication refers to the transmission of information or data without the use of physical connections or cables. It allows devices to communicate with each other wirelessly, enabling data transfer, voice calls, internet access, and more.

Radio Waves:
- Radio waves have long wavelengths and low frequencies, typically ranging from about 1 millimeter to hundreds of kilometers. They are widely used for various forms of communication, including radio broadcasting, television broadcasting, and mobile communication networks.

Microwaves:
- Microwaves have shorter wavelengths and higher frequencies than radio waves. They range from about 1 millimeter to 1 meter in wavelength. Microwaves are used in various applications, such as microwave ovens, satellite communication, and wireless communication systems.

Key Points:
1. Radio waves and microwaves are part of the electromagnetic spectrum.
2. They are used in wireless communications.
3. Wireless communication allows devices to communicate without physical connections.
4. Radio waves have long wavelengths and low frequencies.
5. Microwaves have shorter wavelengths and higher frequencies.
6. Radio waves are used in radio broadcasting, television broadcasting, and mobile communication networks.
7. Microwaves are used in microwave ovens, satellite communication, and wireless communication systems.

In conclusion, radio waves and microwaves are utilized in wireless communications, enabling various forms of data transmission and communication without the need for physical wires or cables.