Convert wavelength in centimetres [cm] to wavelength in exametres Online | Free frequency-wavelength Converter

A Key Scale in Radio and Microwave Technology

A centimetre (cm) is a unit of length equal to 10⁻² metres, and it is commonly used to express the wavelengths of radio and microwave radiation. Electromagnetic waves with wavelengths in the centimetre range typically fall within the radio frequency (RF) and microwave bands, covering frequencies from about 3 GHz to 30 GHz (for wavelengths between 10 cm and 1 cm). These waves are essential in a wide variety of applications, including Wi-Fi, Bluetooth, microwave ovens, radar, and satellite communications.

For example, Wi-Fi signals often operate at 2.4 GHz, which corresponds to a wavelength of about 12.5 cm, and microwave ovens use 2.45 GHz, or around 12.2 cm. These wavelengths are long enough to penetrate walls and other obstacles, making them ideal for communication and sensing. Centimetre-scale wavelengths also allow for the use of reasonably sized antennas in consumer devices and radar systems.

Using centimetres as a unit for wavelength provides a practical scale for understanding and designing devices that use radio and microwave frequencies. It simplifies communication between scientists, engineers, and technicians working in telecommunications, aerospace, medical imaging, and remote sensing.

The Vastest Scales of Cosmic Waves

An exametre (Em) is equal to 1,000 petametres (10¹⁸ metres), representing one of the largest units of length used to describe the longest electromagnetic wavelengths and gravitational waves in the universe. At this scale, wavelengths correspond to frequencies in the zeptohertz (10⁻²¹ Hz) range and lower, which are incredibly slow oscillations occurring over billions of years and spanning distances larger than entire galaxy superclusters.

For example, waves with a frequency of around 1 zeptohertz have wavelengths on the order of 300 exametres. These enormous waves are primarily theoretical and are significant in cosmology and astrophysics for studying the large-scale structure of the universe, primordial fluctuations from the Big Bang, and the behavior of space-time itself.

Using exametres to express wavelength helps scientists conceptualize the almost incomprehensible vastness of the cosmos. These extreme wavelengths provide key insights into the fundamental nature of the universe, including gravitational wave backgrounds and the evolution of cosmic structures on the grandest scales.