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How night vision works using cistrans isomers?
Night vision technology often utilizes cistrans isomers, particularly in the context of photoreceptive compounds like rhodopsin found in the retina. In low-light conditions, these compounds undergo structural changes between cis and trans forms when they absorb photons, triggering a biochemical response that sends signals to the brain. This process enhances our ability to see in dim light by amplifying the available light signals. Essentially, the conversion of light into a neural signal relies on the isomerization of these molecules, enabling night vision.
In what way EZ nomenclature is better than cistrans?
The cis-trans naming system is limited to more simple molecules. For example, if you have a molecule with two carbon atoms joined with a double bond (C=C) and each carbon has two different groups attached to it, there is no clear way of determining which group has the priority of deciding whether or not it is cis or trans. The E-Z system provides rules of priority which allow you to determine whether or not it is E or Z.
