A state in which no gas or matter is present in a given space, recognized as having an absence of substance, often approaching the theoretical limit of emptiness in conditions like outer space, despite the presence of a negligible amount of cosmic material.
A condition characterized by the absence of activity or function, often referred to metaphorically to describe a void or emptiness in a system or organization.
In Buddhist philosophy, a state that transcends all individual characteristics of existence, representing an ultimate understanding where all phenomena are seen as transient and devoid of inherent essence, contrasted with the notion of emptiness in a more superficial sense.
Example:
その実験には真空が必要だ。
A device consisting of a sealed glass or metal tube that contains a vacuum and electrodes, which is used for functions such as signal amplification, rectification, and oscillation in electronic circuits.
An electronic component that operates by controlling the flow of electric current through a vacuum between two or more electrodes, commonly used in radio and television technology.
A specialized vacuum-sealed container where the absence of air allows for the efficient transmission and manipulation of electrical signals, essential in various types of amplification and detection in vintage electronics.
Example:
その爆発で真空管は粉々になった。