MHB Is Light a Particle? Examining the Double-Slit Experiment

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Light must be considered a particle in specific circumstances, notably during the photoelectric effect, where light's particle-like properties are evident. The double-slit experiment highlights the paradox of light behaving both as a wave and a particle, challenging traditional scientific understanding. This experiment remains a focal point in discussions about the nature of light, as it demonstrates the complexities of quantum mechanics. Despite extensive study, a universally accepted explanation for the double-slit phenomenon is still elusive. The ongoing exploration of these concepts is essential for advancing scientific knowledge.
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Are there any circumstances in which light must be considered a particle?

If so, when?
 
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I think the double-slit experiment ...

Double-slit experiment - Wikipedia, the free encyclopedia

... is the most shocking paradox of science of all time. So far no one has been able to give a convincing explanation for the phenomenon, and I think to extend the frontiers of science you have to go from here...

Kind regards

$\chi$ $\sigma$
 

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