Many new types of telescopes were invented including radio telescopes and infrared telescopes

There's a challenge here using custom stereotype keywords like «infrared» and «uv» to categorise elements, because not all UV radiation or infrared radiation can be treated as «optical»:

Wikipedia: 'The wavelength of infrared light ranges from 0.75 to 300 micrometers. Infrared falls in between visible radiation, which ranges from 380 to 750 nanometers, and submillimeter waves.'

Wikipedia: 'Ultraviolet (UV) is a form of electromagnetic radiation with wavelength from 10 nm (with a corresponding frequency of approximately 30 PHz) to 400 nm (750 THz), shorter than that of visible light but longer than X-rays.'

Indeed there are dedicated telescope technologies for handling such radiation outside the wavelength regions where optical mirrors and lenses can be used. So neither the «uv» nor «infrared» custom stereotypes extend «optical»; instead, one can apply EITHER both «optical» and «uv» OR both «optical» and «infrared» where both apply.

The block InfraredTelescope (which extends OpticalTelescope) has both «optical» and «infrared» applied. By contrast, if one were to model a telescope that handles, for example, extreme far infrared in the so-called submillimeter region, one might have a block SubmillimeterTelescope extends TelescopeEM with only «infrared» applied.

Because «visible» extends «optical» it always implies optical.

The new RadioTelescope has «radio» applied, where «radio» extends «em».

Before delving deeper into reflectors that deal primarily with «visible», we're going to look quickly at quantifying the EM regions a bit, so we can start to assign concrete extensions of RegionEM to different types of scopes.

Up next

Optical radiation, visible, UV, and infrared

Notes

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Snippets (quotes/extracts)

In the 20th century, many new types of telescopes were invented, including radio telescopes in the 1930s and infrared telescopes in the 1960s.

Infrared and optical astronomy are often practiced using the same telescopes, as the same mirrors or lenses are usually effective over a wavelength range that includes both visible and infrared light.

Optical radiation is part of the electromagnetic spectrum. It is subdivided into ultraviolet radiation (UV), the spectrum of light visible for man (VIS) and infrared radiation (IR). It ranges between wavelengths of 100 nm to 1 mm [DISPUTED]

The wavelength of infrared light ranges from 0.75 to 300 micrometers. Infrared falls in between visible radiation, which ranges from 380 to 750 nanometers, and submillimeter waves.

Ultraviolet (UV) is a form of electromagnetic radiation with wavelength from 10 nm (with a corresponding frequency of approximately 30 PHz) to 400 nm (750 THz), shorter than that of visible light but longer than X-rays.