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Demonstration of Time Dilation - Formula
This section continues the thought experiment to demonstrate time dilation. An isosceles triangle is used to derive the time dilation formula with Lorentz factor. 2022-10-05, ∼208🔥, 0💬

Hamiltonian in Cartesian Coordinates
This section provides a quick introduction on Hamiltonian for a single object in Cartesian coordinates. 2022-10-05, ∼189🔥, 0💬

What Is Space
This section provides a quick introduction of space, which is a property of our universe that gives us a sense of the size of an object and the distance between two objects. 2022-10-05, ∼180🔥, 0💬

Newton's First Law of Motion
This section introduces Newton's First Law of Motion - If the net force acting on an object is zero, then the velocity of the object is constant. 2022-10-05, ∼190🔥, 0💬

Length Contraction Formula and Lorentz Factor
This section provides steps to derive the length contraction formula expressed with the Lorentz factor, based a thought experiment and the time dilation formula. 2022-10-05, ∼262🔥, 0💬

What Is Phase Portrait
This section provides an introduction to Phase Portrait, which is the trajectory curve of a system in the the Phase Space for a given period of time. 2022-10-05, ∼203🔥, 0💬

What Is Distance
This section introduces distance between two objects. The standard unit of distance is called 'meter', which is the length travelled by light in 1/299,792,458 of a second. 2022-10-05, ∼191🔥, 0💬

What Is Duration
This section introduces duration between two events. The standard unit of duration is called 'second', which is the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom. 2022-10-04, ∼166🔥, 0💬

Introduction of Speed
This chapter provides an introduction of speed. Topics include definition of speed; dependency of speed on frame of reference; measuring speed of light. 2022-10-04, ∼156🔥, 0💬

Measuring Speed of Light - Foucault's Method
This section describes the method used by Léon Foucault to measure the speed of light using using a rotating mirror and a fixed mirror. 2022-10-04, ∼289🔥, 0💬

What Is Light Cone
This section provides a quick introduction of light cone, which is a 4-dimensional surface in a spacetime frame where all events on the surface can be connected to a central event by light. 2022-10-04, ∼223🔥, 0💬

Physics Notes - Herong's Tutorial Notes
This book is a collection of notes on physics. Key sections are: What Is Space, Time and Speed; Frame of Reference; Coordinate Systems; Newton's Laws of Motion; Special Theory of Relativity; Time Dilation; Length Contraction; Minkowski spacetime; Lorentz transformation; Minkowski diagram; Hamiltonia... 2022-10-04, ∼531🔥, 0💬

What Is an Inertial Frame of Reference
This section describes an inertial frame of reference - a frame of reference in which no acceleration can be detected in any direction. 2022-10-04, ∼207🔥, 0💬

Who Is Newton
This section provides a quick introduction of Issac Newton and his main contribution to physics, Newton's Laws of Motion. 2022-10-04, ∼200🔥, 0💬

Formula for the Relativity of Simultaneity
This section provides a thought experiment to derive the formula for the relativity of simultaneity. 2022-10-04, ∼214🔥, 0💬

Demonstration of Time Dilation - Amy on the Train
This section provides a thought experiment to demonstrate time dilation by starting with Amy synchronizing a clock with a bouncing light pulse on a moving train. 2022-10-04, ∼280🔥, 0💬

What Is Spacetime
This section provides a quick introduction of speed, which is a mathematical model used to describe our universe in frame of references that combines space and time together. 2022-10-04, ∼205🔥, 0💬

Full Version in PDF/ePUB
Information on how to obtain the PDF version of this book for printing. 2022-04-13, ∼1350🔥, 3💬

💬 2022-04-13 amritash mukherjee: simplistically explained a very complex subject

💬 2017-08-03 zanchin: Thank you for the good work!

Measuring Speed of Light - Fizeau's Method
This section describes the method used by Armand Fizeau to measure the speed of light using using a rotating toothed wheel and a mirror. 2022-01-22, ∼1536🔥, 2💬

💬 2022-01-22 nina: just wanted to do this math question

Reciprocity of Length Contraction
This section introduces the reciprocity of length contraction. Length of a moving object is shorter when measured by a stationary observer; and length of a stationary object is shorter when measured by a moving observer. 2021-01-31, ∼917🔥, 2💬

💬 2021-01-31 Herong: Abhinav, which part is confusing?

💬 2021-01-14 Abhinav: This is confusing

References
List of reference materials used in this book. 2020-07-02, ∼453🔥, 1💬

💬 2020-07-02 Mangala: Important information

Reciprocity of Time Dilation
This section introduces the reciprocity of time dilation. Elapsed time of a moving clock is slower when measured by a stationary observer; and elapsed time of a stationary clock is slower when measured by a moving observer. 2020-06-26, ∼2617🔥, 3💬

💬 2020-06-26 Don Pedro: Time dilation as an observer in special relativity ...

💬 2017-12-09 Herong: Hanan, this is just a thought experiment. Actually, Amy and Bob will never be able to measure the other's clock.

💬 2017-12-05 Hanan Abid: And who is right Amy or Bob?? If they could see each other's clock. One clock would definitely be ahead of other or not its just...

Relativity of Simultaneity in Minkowski Diagram
This section provides a demonstration of the relativity of simultaneity phenomenon using a Minkowski diagram. 2019-01-17, ∼1091🔥, 1💬

💬 2019-01-17 hiroji kurihara: Relativity of simultaneity From just above, plane waves of star light are coming horizontally. An observer stands on the ground ...

Newton's Second Law of Motion
This section introduces Newton's Second Law of Motion - The acceleration of an object is directly proportional to the net force acting on the object, and inversely proportional to the mass of the object. 2018-03-21, ∼1335🔥, 2💬

💬 2018-03-21 datboi: bojour

💬 2016-09-21 jjjjjjjjjr: This pic is awsome

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Android ASP Astrology Big5 Bitcoin Blowfish Built-in C# Calendar CD-DVD Cheminformatics Chinese Cryptography DES Email Encoding Ethereum Flash GB2312 General H Herong History HTML Java JavaScript JDBC JSP JVM Linux Molecule Movie Music MySQL Neural Network Perl PHP Physics PKI Publication Python REST SOAP Sorting Swing TV Series UML Unicode VBScript Web Web-Services Windows WSDL XML XMLPad XSD XSL-FO