Calculate wavelengths from frequencies and compare EM regions in a table

Values for the wavelength range for radio are calculated for an instance radio:RegionRadio from stated frequency range values using SysML Parametrics in Magic Cyber-Systems Engineer ^® (Cameo Systems Modeler^®) or Magic Model Analyst^® (Cameo Simulation Toolkit^®) and compared with stated values.

A table also includes instances of each of the other regions modelled so far, with stated wavelength ranges. (The cut-off point for "optical" infrared is relatively arbitrary.)

And the instances are also shown on a Package Diagram.

Click on the image to view it full size

A quick tool tip:

TIP: UML/SysML: MagicDraw/Cameo: Consider showing the constraint parameter name and type label inside the small rectangular parameter symbol on SysML Parametric Diagrams. Dr Darren swears by it!

The SysML Parametrics calculation was launched from the radio:RegionRadio row of the table, not from the instance symbol in a BDD or Package Diagram because:

GOTCHA: Cameo: If you run a parametrics calculation from an instance symbol in a diagram it will just show computed values in the simulation window; if you run from an Instance Table diagram it will populate the instance Slots with the computed values.

The agreement between the stated and calculated wavelength ranges is exact (at least to the accuracy shown).

There is a slight overlap between UV and visible as gleaned from Wikipedia so far, but this is not a big concern:

Wikipedia: 'Various sources define visible light as narrowly as 420–680 nm to as broadly as 380–800 nm.'

Wikipedia: 'Under ideal laboratory conditions, people can see infrared up to at least 1050 nm; children and young adults may perceive ultraviolet wavelengths down to about 310–313 nm.'

More worrying is that sub-millimeter infrared is completely missing, but we saw earlier in the trail how taking values from partially inconsistent snippets from Wikipedia has led to this (and we saw also how the Webel Parsing Analysis recipe for SysML^® enables us to record such issues).

OK, it's time to gather and focus some visible light with some basic optical reflector telescopes. For the rest of this trail section we will not be dealing at all with radio, infrared, or ultraviolet.

Up next

An optical telescope is a telescope that gathers and focuses light mainly from the visible part of the electromagnetic spectrum

Notes

[TIP, TOOL]{INFORMATIVE} GOTCHA: Cameo: If you run a parametrics calculation from an instance symbol in a diagram it will just show computed values in the simulation window; if you run from an Instance Table diagram it will populate the instance Slots with the computed values.

[CAPABILITY, FEATURE, STYLE, TIP]{RECOMMENDED} TIP: UML/SysML: MagicDraw/Cameo: Consider showing the constraint parameter name and type label inside the small rectangular parameter symbol on SysML Parametric Diagrams. Dr Darren swears by it!

Snippets (quotes/extracts)

Various sources define visible light as narrowly as 420–680 nm to as broadly as 380–800 nm.

Under ideal laboratory conditions, people can see infrared up to at least 1050 nm; children and young adults may perceive ultraviolet wavelengths down to about 310–313 nm.

Visit also

Visit also (backlinks)

Related slides (includes other tutorials)

Calculate whether a specific particle is a lepton using SysML parametrics