Light at the end of the rabbit hole: how to determine appropriate lighting levels as part of a total security program
Abstract:
Appropriate lighting coupled with additional security meth- ods has been shown to reduce the occurrence of crime, the author reports in this article which describes the characteristics of lighting, how to decide how much light to use, and how and when to conduct lighting assessments.
Related Concept Videos
02:00Photoreceptors and Plant Responses to Light
28.9K
Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
28.9K
01:16Flame Photometry: Lab
1.2K
In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
1.2K
02:16Light Acquisition
9.8K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
9.8K