Semen is produced and originates from the seminal vesicle, which is located in the pelvis. The process that results in the discharge of semen is called ejaculation. Semen is also a form of genetic material. In animals, semen has been collected for cryoconservation. Cryoconservation of animal genetic resources is a practice that calls for the collection of genetic material in efforts for conservation of a particular breed.
The measure of this brightness is the luminance in candela per square metre6. 2.4.1 Luminance and Brightness We have used the terms luminance and brightness interchangeably.
candela per metre squared, we can appreciate that this is an extremely bright source. If we are considering a park footpath lighting level as 0.5 lux, this is more light than cast by a full moon, but not by much. 2 Introduction to Photometry In this section we take a more detailed and rigorous look at the measurement units relevant to light pollution.