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Shadows play an important role for the perception of spatial structures and perspective, and for general orientation. Good shadow conditions are created th...
Mon, 27 Jun, 2016 at 4:32 PM
Plane Angle
The plane angle a is determined by the length of the arc a and the radius r. The
biggest plane angle obtains for a full circle (2πr...
Mon, 27 Jun, 2016 at 4:36 PM
Luminous efficiency depends not only on radiant energy, i.e. the amount of light that enters the human eye, but also on its spectral properties. The human ...
Tue, 28 Jun, 2016 at 9:57 AM
The spectrum of radiation describes its composition with regard to wavelength. Licht, for example, as the portion of electromagnetic radiation that is visi...
Tue, 28 Jun, 2016 at 10:46 AM
In addition to Ballast, fluorescent lamps (and compact fluorescent lamps) also require a starter for the ignition process. The starter closes a circuit t...
Tue, 28 Jun, 2016 at 10:49 AM
Light emission from gas discharge lamps without fluorescent materials is an almost inertia-free reproduction of the time response of alternating current (5...
Tue, 28 Jun, 2016 at 10:50 AM