It's arbitrary, but one answer is ...
infra-red, microwave, and radio.
It's detected by means of a camera that is sensitive to infra-red light. Visible light forms only a tiny portion of the electromagnetic spectrum.
Ultraviolet radiation lies just outside the high-frequency end of the visible spectrum. It has shorter wavelengths and higher energy levels than visible light, which makes it invisible to the human eye but can still cause damage to skin and eyes. UV radiation is commonly emitted by the sun and certain artificial sources like tanning beds.
Visible radiation (a.k.a. light) is the wavelengths we can see. Infrared radiation lies down below the red end of the spectrum that we can see, hence infra red. But we can make device that both generate and detect infra red radiation. Your TV control works this way.
Astronomers study as much of the spectrum of radiation as they can, and the visible spectrum is only a small segment of it.
The visible spectrum
By definition, ultra-violet light is outside the visible spectrum of EM radiation. Thus it is defined as invisible.
Radiation is invisible to the human eye because it has a wavelength that is outside the visible spectrum. This means that the energy emitted by radiation is not within the range that our eyes can detect, making it invisible to us.
It all depends upon where you place the boundaries of the infrared spectrum. The electromagnetic spectrum is a continuum and there is no exact boundary for any particular designation. If you define IR as that radiation below red which is invisible then Yes it is invisible.
The five invisible waves are radio waves, microwaves, infrared radiation, ultraviolet radiation, and X-rays. These waves are part of the electromagnetic spectrum and are not visible to the human eye.
Broadcasts such as infrared, microwaves, and radio waves are part of the invisible spectrum as they have wavelengths beyond the visible light spectrum and cannot be seen by the human eye. These forms of electromagnetic radiation are used in various technologies for communication, heating, and other purposes.
The invisible light spectrum refers to electromagnetic radiation that is not visible to the human eye. This includes ultraviolet (UV) light, infrared (IR) light, and X-rays, among others. These types of light have different wavelengths and properties compared to visible light.
The range of wavelengths for visible light is approximately 400 to 700 nanometers (nm). This spectrum encompasses the colors from violet, which has the shortest wavelength around 400 nm, to red, with the longest wavelength at about 700 nm. Visible light is a small part of the electromagnetic spectrum, situated between ultraviolet and infrared radiation.
The visible spectrum between red and violet.
The visible spectrum is one band within the full range of electromagnetic radiation.
The visible spectrum refers to the range of light wavelengths that are visible to the human eye, which includes colors from violet to red. The invisible spectrum, on the other hand, includes wavelengths outside of the visible range, such as ultraviolet and infrared light, which cannot be seen by the human eye without special equipment.
It's detected by means of a camera that is sensitive to infra-red light. Visible light forms only a tiny portion of the electromagnetic spectrum.
The visible light spectrum is the narrow range of wavelengths in the electromagnetic spectrum that humans can see, typically between 400 to 700 nanometers. Beyond this range lie ultraviolet and infrared radiation, which are invisible to the human eye.