P10: Quantum Physics and Reality - Is the Moon There When Unseen? (量子物理與現實——當你沒有在看時，月亮還在嗎？)

This talk explores one of the most profound and enduring questions in physics: does reality exist independently of observation? At the heart of this question lies the historic debate between Albert Einstein and Niels Bohr—two towering figures of 20th-century physics—over the interpretation of quantum mechanics.

We will examine the concepts of hidden variables, quantum entanglement, and nonlocality, culminating in a discussion of Bell’s theorem and its experimental tests. These ideas not only challenge classical intuitions about causality and locality, but also touch upon deep philosophical questions about the nature of reality. The talk will highlight the significance of the 2022 Nobel Prize in Physics, awarded for pioneering experiments that confirm quantum mechanics' strange predictions. This lecture offers a journey through physics and philosophy, where measurement, reality, and uncertainty intertwine.

Students will have the opportunity to immerse themselves in the fascinating world of quantum physics through interactive experiences powered by virtual reality (VR) technology.

本講座將探討物理學中一個最深刻且發人深省的問題：現實是否在沒有被觀察時仍然存在？這個問題正是二十世紀兩位物理巨擘——愛因斯坦與玻爾——之間著名論辯的核心。他們對量子力學的詮釋提出了截然不同的觀點，開啟了一場跨越物理與哲學的深層對話。

我們將從隱變量理論、量子糾纏與非定域性出發，深入探討貝爾定理及其在實驗中的驗證。這些發展不僅顛覆了我們對因果關係與空間距離的傳統理解，也引發對「真實存在」本質的哲學思考。本講座亦將介紹2022年諾貝爾物理學獎所表彰的開創性實驗成果，這些實驗進一步印證了量子力學中看似違反常理的預測。這將是一場結合物理與哲學的知識旅程，帶您重新思考觀測、現實與不確定性的意義。

學生亦將有機會透過虛擬實境（VR）技術，親身體驗量子世界的奧妙與奇幻。

Speaker: Prof. Sunny WANG
Target Audience: Form 5 - 6
Duration: 1.5 hours
Medium of Language: English or Mandarin

Registration: https://www.cityu.edu.hk/csci/local-school-outreach/popular-science-talks