In quantum mechanics, measurements are indeed interactions between particles or systems being measured and the measuring apparatus. When a measurement is made on a quantum system, it generally involves an interaction that provides information about certain properties of the system.
According to the principles of quantum mechanics, the act of measuring a property of a quantum system causes its wave function (a mathematical description of its state) to collapse into one of the possible measurement outcomes. This is known as the collapse of the wave function or wave function collapse.
The specific outcome of a measurement is probabilistic, and the probability of obtaining a particular measurement result is determined by the wave function of the system prior to the measurement. The wave function encodes the probabilities associated with different measurement outcomes, and the act of measurement selects one of those outcomes.
It is important to note that the act of measurement in quantum mechanics is not fully understood and remains a topic of philosophical and interpretational debates. Various interpretations of quantum mechanics, such as the Copenhagen interpretation, the many-worlds interpretation, or the pilot-wave theory, offer different perspectives on the nature of measurement and the underlying processes involved.
Overall, in the framework of quantum mechanics, measurements are considered interactions between particles or systems being measured and the measuring apparatus, and they play a fundamental role in determining the properties and behavior of quantum systems.