Academic notebook

Physics

Newton’s Laws – Most Common Misconceptions

Newton's laws of dynamics form the foundation of classical physics and are an integral part of school education. Unfortunately, they are often presented in a simplified, and even erroneous manner, which can lead to misunderstandings and difficulties in deeply comprehending these fundamental principles. In this article, we will discuss the classic laws of dynamics, highlighting the frequent errors and simplifications encountered in schools and everyday reasoning.
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Vortex Electric Field—A Discovery Poised to Revolutionize Nanoelectronics

Modern science continually searches for innovative avenues to reshape the landscape of electronics and computing. In recent years, two-dimensional (2D) materials, such as graphene, have captured global attention as researchers explore their extraordinary properties. Now, a breakthrough by Professor Ly Thuc Hue’s team at the City University of Hong Kong (CityUHK) marks another pivotal moment in this rapidly evolving field.
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New Observations of Group Delay in Multiphoton Processes

Scientists in Canada have made a groundbreaking advance in the field of quantum optics by observing group delay phenomena induced by gain during spontaneous parametric down-conversion (SPDC). In SPDC, a single high-energy photon is converted into two lower-energy “daughter” photons. Previous studies had largely focused on scenarios with a low probability of such photon conversions. However, by increasing the intensity of the pump laser, the researchers were able to generate multiple photon pairs simultaneously, ultimately revealing a measurable shift in the arrival times of the daughter photons.
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Huygens–Fresnel principle

Huygens–Fresnel principle (also known as Huygens principle) says that all wave front points can be considered sources of new spherical waves. The position of the wavefront after at time t…
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What is polarization of light?

Polarization (in physics) is limiting transverse wave vector vibrations to some direction. For non-polarised electromagnetic waves, such as visible light, the electric field vibrates in all directions perpendicular to the…
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