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  2. Observer effect (physics) - Wikipedia

    en.wikipedia.org/wiki/Observer_effect_(physics)

    In physics, the observer effect is the disturbance of an observed system by the act of observation. [1] [2] This is often the result of utilising instruments that, by necessity, alter the state of what they measure in some manner. A common example is checking the pressure in an automobile tire, which causes some of the air to escape, thereby ...

  3. Observer effect - Wikipedia

    en.wikipedia.org/wiki/Observer_effect

    Hawthorne effect, a form of reactivity in which subjects modify an aspect of their behavior, in response to their knowing that they are being studied; Observer-expectancy effect, a form of reactivity in which a researcher's cognitive bias causes them to unconsciously influence the participants of an experiment

  4. Observation - Wikipedia

    en.wikipedia.org/wiki/Observation

    One problem encountered throughout scientific fields is that the observation may affect the process being observed, resulting in a different outcome than if the process was unobserved. This is called the observer effect. For example, it is not normally possible to check the air pressure in an automobile tire without letting out some of the air ...

  5. List of effects - Wikipedia

    en.wikipedia.org/wiki/List_of_effects

    Oberth effect (physics) Observer effect (information technology) (computer programming) Observer effect (physics) (physics) Observer-expectancy effect (cognitive biases) (cognitive psychology) Occlusion effect (biology) (otology) Octave effect (effects units) Okorokov effect (physics) Oligodynamic effect (biology and pharmacology of chemical ...

  6. Applications of quantum mechanics - Wikipedia

    en.wikipedia.org/wiki/Applications_of_quantum...

    This is a natural result of the behavior of quantum bits; due to the observer effect, if a bit in a superposition state were to be observed, the superposition state would collapse into an eigenstate. Because the intended recipient was expecting to receive the bit in a superposition state, the intended recipient would know there was an attack ...

  7. Von Neumann–Wigner interpretation - Wikipedia

    en.wikipedia.org/wiki/Von_Neumann–Wigner...

    In the orthodox Copenhagen interpretation, quantum mechanics predicts only the probabilities for different observed experimental outcomes.What constitutes an observer or an observation is not directly specified by the theory, and the behavior of a system under measurement and observation is completely different from its usual behavior: the wavefunction that describes a system spreads out into ...

  8. Observer (quantum physics) - Wikipedia

    en.wikipedia.org/wiki/Observer_(quantum_physics)

    The observer has, rather, only the function of registering decisions, i.e., processes in space and time, and it does not matter whether the observer is an apparatus or a human being; but the registration, i.e., the transition from the "possible" to the "actual," is absolutely necessary here and cannot be omitted from the interpretation of ...

  9. Relativistic beaming - Wikipedia

    en.wikipedia.org/wiki/Relativistic_beaming

    Aberration is the change in an object's apparent direction caused by the relative transverse motion of the observer. In inertial systems it is equal and opposite to the light time correction. In everyday life aberration is a well-known phenomenon. Consider a person standing in the rain on a day when there is no wind.