"We call this twofold nature the particle-wave duality, meaning that EM radiation has both particle and wave properties."
https://phys.libretexts.org/Bookshelves/College_Physics/College_Physics_1e_(OpenStax)/29%3A_Introduction_to_Quantum_Physics/29.05%3A_The_Particle-Wave_Duality_of_Light
"the very act of observing a particle has a dramatic effect on its behaviour."
https://plus.maths.org/content/physics-minute-double-slit-experiment-0?page=1
"The double-slit experiment is one of the simplest demonstrations of this wave-particle duality as well as a central defining weirdness of quantum mechanics, one that makes the observer an active participant in the fundamental behavior of particles."
https://interestingengineering.com/science/what-is-the-double-slit-experiment-and-why-is-it-so-important
"The observer effect in quantum mechanics indicates that the quantum wavefunction collapses when an observation is made by an observer. It is a consequence of the traditional Copenhagen interpretation of quantum physics. Under this interpretation, does that mean that there must be an observer in place from the beginning of time? Does this prove a need for God's existence, so that his act of observing the universe would bring it into being?"
"The argument being exploited in this method of proving God is that there needs to be an observer to cause a collapse."
"At the point the observer potentially exists, there is, therefore, an act of observation, and the universe collapses into that state."
https://www.thoughtco.com/does-quantum-physics-prove-gods-existence-2699279
"All quantum experiments have confirmed that there is no measurable, solid reality “out there” independent of the measurer. What is “out there” when we’re not looking is an infinite wavy cloud of criss-crossing possibilities. Then when we focus our attention on something, the wave function collapses into a defined particle in a definite location for us to observe."
http://www.atlanteanconspiracy.com/2012/09/the-measurement-problem-observer-effect.html?m=1
"Only by looking at things, observing them, measuring them, do we make them recognisably “real”."
"Only the act of looking at a quantum object “collapses” its wave function, jolting it from a shadowy netherworld into definite reality"
http://landing.newscientist.com/department-for-education-feature-3/