This illustration shows the relationship between wavelength and frequency of the electromagnetic spectrum. The scale of the wavelength ranges from ten to the power of minus twelve meters to ten to the power of four meters. The frequency scale ranges from ten to the power of twenty Hertz to ten to the power of four Hertz. The figure indicates that the SPOT satellite captures imagery in the visible and infrared wavelength (micrometer), while the Radarsat satellite operates in the microwave range of five point three gigaHertz.

This illustration shows the relationship between wavelength and frequency of the electromagnetic spectrum in the ultraviolet portion. It reveals that ultraviolet wavelengths range is between ten to the power of minus ten meters, and ten to the power of minus five meters.

This illustration shows the relationship between wavelength and frequency of the electromagnetic spectrum in the visible portion of the spectrum. It reveals that the visible wavelength range is from point four times ten to the power of minus six meters, and point seven times ten to the power of minus six meters.

This illustration shows the relationship between wavelength and frequency of the electromagnetic spectrum in the infrared. It reveals that the infrared is in the wavelengths ranging from ten to the power of minus seven meters and ten to the power of minus three meters. It also contains areas of the near, mid and far infrared.

This illustration shows the relationship between wavelength and frequency of the electromagnetic spectrum in the microwave. It reveals that the microwaves are in the wavelength range from ten to the power of minus three meters, and one meter. In terms of frequencies, they range between zero point three gigaHertz, and 40 gigaHertz. Microwaves are divided into several sub-groups called bands Ka, K, Ku, X, C, S, L, and P.