Definition: Absorption: The process by which a substance absorbs or assimilates chemical, physical, or mechanical energy from another substance. Detailed Definition: Absorption refers to the ability of an object to absorb or assimilate chemical energy, such as heat or light, from another object. This is often measured in units of absorbed power (W), where 1 W = 1 Joule per second (J/s). Absorption can be a result of direct contact between two objects, such as in the case of gas or liquid absorption, or it can also occur through molecular interactions between molecules. Absorptive properties are often measured in terms of the number of joules absorbed or assimilated by an object over time, as this quantity represents the rate at which chemical energy is being removed from an absorbing substance. In physics and chemistry, absorption is a fundamental principle that underlies many processes, such as thermal conduction (the transfer of heat) and photodissociation (the process by which light absorbed by an absorbing molecule splits into its constituent particles). Absorption can also be used to describe the ability of objects to change or transform their state based on their surroundings.
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