The entire visible spectrum plus the infrared and ultraviolet. They are trying to obscure the stars light and see the faint reflections of any planets nearby.
The biggest telescopes on Earth typically operate in the optical and infrared parts of the electromagnetic spectrum. These telescopes are used to study a wide range of celestial objects, from planets and stars to galaxies and quasars.
it is used to see visible light in the atmoshere
visible light
Perhaps you are after the word band or bandwidth.
The visible light portion of the electromagnetic spectrum would be used to study waves that humans can see. This portion of the spectrum includes colors ranging from red to violet and is the only part of the spectrum visible to the human eye.
The electromagnetic spectrum
The biggest telescopes on Earth typically operate in the optical and infrared parts of the electromagnetic spectrum. These telescopes are used to study a wide range of celestial objects, from planets and stars to galaxies and quasars.
radiation
it is used to see visible light in the atmoshere
Infrared waves from the electromagnetic spectrum are used in heat lamps and heat sensing devices.
visible light
-- aeronautical mobile -- aeronautical radionavigation
The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation.[1] The "electromagnetic spectrum" of an object is the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object.
The part of the electromagnetic spectrum with the lowest frequency and longest wavelength is radio waves. They are used for communication, broadcasting, and radar.
Radio Frequency
Infrared waves from the electromagnetic spectrum are used in heat lamps and heat sensing devices. These waves are able to transfer energy as heat when absorbed by an object and are commonly used in applications where heat is desired, like in infrared heaters and thermal imaging cameras.
ultraviolet light