I How see through the glass + reflection at same time

rxrus
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When its day we can kind of see our reflection a little bit and also see outside, when its night we can fully see our reflection in the glass window.
Can someone explain quantum mechanics behind it because i think iv read an article long time ago on it but can't find it anymore.
 
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I don't know what the article you read long ago was, but I do know that you will find the answer to your question in Feynmann's (very layman-friendly) book "QED: The strange theory of light and matter".
 
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rxrus said:
When its day we can kind of see our reflection a little bit and also see outside, when its night we can fully see our reflection in the glass window.
Can someone explain quantum mechanics behind it because i think iv read an article long time ago on it but can't find it anymore.
Why do you think this is a quantum effect? The transmission and reflection can be explained in classical optics by the Fresnel equations. The greater visibility of the reflection against a dark background is not a quantum effect either.
 
No quantum mechanics needed.

Why don't you see the stars during the day? I think the reason is similar.
 
Yes i am aware of classical physics explanation but i wanted to hear quantum physics side of it.
Nugatory i really like Feynman so i will read that book.
 
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Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. Towards the end of the first lecture for the Qiskit Global Summer School 2025, Foundations of Quantum Mechanics, Olivia Lanes (Global Lead, Content and Education IBM) stated... Source: https://www.physicsforums.com/insights/quantum-entanglement-is-a-kinematic-fact-not-a-dynamical-effect/ by @RUTA
Is it possible, and fruitful, to use certain conceptual and technical tools from effective field theory (coarse-graining/integrating-out, power-counting, matching, RG) to think about the relationship between the fundamental (quantum) and the emergent (classical), both to account for the quasi-autonomy of the classical level and to quantify residual quantum corrections? By “emergent,” I mean the following: after integrating out fast/irrelevant quantum degrees of freedom (high-energy modes...
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