Final answer:
A NOT gate, also known as an inverter, can be realized in physical science using various electronic components such as transistors. One common implementation is using a transistor in a configuration called a common-emitter amplifier.
Step-by-step explanation:
A NOT gate, also known as an inverter, is a logic gate that outputs the opposite of its input. In physical science, a NOT gate can be realized using various electronic components such as transistors. One common implementation of a NOT gate is using a transistor in a configuration called a common-emitter amplifier. When the input voltage is low, the transistor is turned on and the output voltage is high. When the input voltage is high, the transistor is turned off and the output voltage is low. Another implementation of a NOT gate is using a De Morgan's theorem and a combination of other logic gates. By connecting an AND gate and a NAND gate in a specific configuration, they can act as a NOT gate.