Mathematical intuition behind Special and General Relativity
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Mastering Special and General Relativity: from the incompatibility between Galileo’s principle and Maxwell’s equations to the unraveling of the greatest “mathematical secrets” of the universe.
Students who take the course will learn the following:
- Understand the incompatibility between Galileo’s principle and Maxwell’s equations.
- Formulate Special Relativity and General Relativity consistently.
- Develop the mathematical intuition required to fully grasp and appreciate the contents of these subjects.
- Learn about Lagrangian mechanics and the Action Principle.
- Understand tensors and their applications in relativity.
- Derive Lorentz transformations in two different ways.
- Learn about the mathematics required to follow the part on General Relativity.
- Meet the prerequisite requirements, including Calculus and Multivariable Calculus.
- Develop skills in problem-solving, critical thinking, and mathematical reasoning.
- Build a strong foundation in advanced physics and mathematics, which can be applied in future studies or research.
Here are some benefits of taking the course on Special and General Relativity:
- Gain a deep understanding of the principles and concepts underlying Special and General Relativity, which are foundational to modern physics and astronomy.
- Develop strong mathematical skills required to fully grasp and appreciate the subject matter, including Lagrangian mechanics and tensor calculus.
- Learn how to derive important equations in Special and General Relativity, including the Lorentz transformations and the Einstein field equations.
- Gain insight into the implications of Special and General Relativity for our understanding of space, time, and gravity, and how these concepts are used in modern physics and astronomy.
- Engage with a challenging and stimulating subject matter, which can help to develop critical thinking skills and problem-solving abilities.
- Potentially open up opportunities for further study or research in the fields of physics, astronomy, or related areas.
- Gain a sense of satisfaction and accomplishment from tackling a complex and challenging subject and mastering its concepts and techniques.
Course description:
- We start by explaining the problem with Galileo’s principle and Maxwell’s equations and how this led to the formulation of Special Relativity.
- We expand the discussion to General Relativity and highlight the importance of mathematical intuition in fully grasping the concepts.
- We motivate every equation in the course to help students understand the underlying principles and theories.
- We provide a comprehensive explanation of Lagrangian mechanics and tensors, which are essential to understanding Special and General Relativity.
- We assume a prerequisite knowledge of Calculus and Multivariable Calculus, including the divergence theorem, vectors, dot and cross products, matrix multiplication, and determinants.
- We suggest some basic knowledge of Classical physics, including scalar potential, Newton’s laws, kinetic energy, energy conservation, and the wave equation.
- The first part of the course will focus on Lorentz transformations and derive them in two different ways, providing a simpler mathematics to follow along.
- The second part of the course will focus on General Relativity, where a pencil and paper are recommended to derive the equations, ensuring that students meet the prerequisite requirements.
- We provide students with a comprehensive understanding of Special and General Relativity and inspire them to appreciate and apply the theories.
- The course is designed for students who are passionate about physics and mathematics, especially those interested in pursuing higher education in these fields.
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3Lorentz trasformation derivation part 1Video lesson
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4Lorentz trasformation derivation part 2 - SimultaneityVideo lesson
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5Lorentz trasformation derivation part 3Video lesson
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6Lorentz transformation derivation part 4Video lesson
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7Lorentz transformation derivation part 5Video lesson
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8Lorentz transformation derivation part 6Video lesson
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9Lorentz transformation derivation part 7Video lesson
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10Lorentz invariant quantityVideo lesson
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11A different derivation of Lorentz transformations part 1Video lesson
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12A different derivation of Lorentz transformations part 2: rotation matricesVideo lesson
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13A different derivation of Lorentz transformations part 3Video lesson
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14A different derivation of Lorentz transformations part 4Video lesson
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15A different derivation of Lorentz transformations part 5Video lesson
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16Composition of velocities according to Galileo and LorentzVideo lesson
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19Introduction to Lagrangian mechanicsVideo lesson
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20Lagrangian mechanics part 1Video lesson
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21Lagrangian mechanics part 2Video lesson
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22Lagrangian mechanics part 3Video lesson
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23Lagrangian mechanics part 4Video lesson
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24Additional comments on the Lagrangian, variation of the actionVideo lesson
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25Derivation of the HamiltonianVideo lesson
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26Definition of momentumVideo lesson
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35Tensor transformations part 1Video lesson
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36Tensor transformations part 2Video lesson
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37Higher rank tensors from lower rank tensorsVideo lesson
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38Lower rank tensors from higher rank tensorsVideo lesson
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39Transformation of Euclidean derivativesVideo lesson
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40Covariant DerivativeVideo lesson
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41Some properties of the metric tensorVideo lesson
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42Christoffel symbol in terms of the metric tensor part 1Video lesson
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43Christoffel symbol in terms of the metric tensor part 2Video lesson
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44Covariant derivative of the metric tensorVideo lesson
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45Covariant derivative of a contravariant vector part 1Video lesson
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46Covariant derivative of a contravariant vector part 2Video lesson
Note#1: at about 6:41,as I've added in the notes of the last lecture, some tildes are wrong in some expressions, but I will correct them in this lecture.
Note#2: at 15:56 I mention the Ricci tensor: before the Ricci tensor we will introduce the Riemann tensor, but yeah....after that comes the Ricci tensor ;)
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47Proof that the covariant derivative of the metric tensor is zeroVideo lesson
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48Equation of a geodesicVideo lesson
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49Geodesic and parallel transportVideo lesson
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50Riemann tensor part 1Video lesson
Note: I will do another derivation of the Riemann tensor in the Appendix.
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51Some properties of : Riemann_tensor, Ricci tensor, Ricci scalarVideo lesson
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52Action in General RelativityVideo lesson
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53Invariant 4-volume element in the actionVideo lesson
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54Determinant of the metric tensorVideo lesson
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55Variation of the action of gravity part 1Video lesson
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56Variation of the action of gravity part 2Video lesson
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57Variation of the action of gravity part 3Video lesson
Note#1: at about 1:04, instead of 'v', there should be 'w'.
Note#2: at about 7:11 'v' should be replaced by 'w'.
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58Einstein field equations part 1Video lesson
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59Einstein field equations part 2: another property of the Riemann tensorVideo lesson
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60Einstein field equations part 3: energy momentum tensorVideo lesson
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61Field equations in classical physicsVideo lesson
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62Reducing General Relativity to Newtonian lawsVideo lesson
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63Final form of the field equationsVideo lesson
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64Gravitational time dilationVideo lesson
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65Shell theorem (used in Gravitational time dilation)Video lesson
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66Lorentz transformations as derived by EinsteinVideo lesson
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67The physical meaning that Einstein attributed to Lorentz transformationsVideo lesson
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68How Einstein derived the composition of velocities in SRVideo lesson
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69How the Maxwell equations in vacuum transform in inertial framesVideo lesson
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70Relativistic Doppler effect, aberration, transformation of the energyVideo lesson
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71How Einstein derives his famous equation E=mc^2Video lesson
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72Dynamics of an accelerated charged bodyVideo lesson
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73How Einstein shows that the inverse of the metric tensor is also a tensorVideo lesson
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74How Einstein shows the invariance of the infinitesimal volume elementVideo lesson
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75How Einstein derives the equation of a geodetic lineVideo lesson
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76How Einstein derives the concept of covariant derivativeVideo lesson
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77General Relativity: rule of differentiation of determinantsVideo lesson
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78How Einstein derives the concept of covariant divergenceVideo lesson
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79Other important tensor expressions derived by Einstein in his paper on GeneralVideo lesson
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80How Einstein derives the Riemann tensor in his paper on General RelativityVideo lesson
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81How Einstein derives the field equations in the absence of matterVideo lesson
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82How Einstein derives the field equations from the variation principleVideo lesson
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83How Einstein derives the field equations in the presence of matterVideo lesson
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84How Einstein derives the energy tensor of a frictionless adiabatic fluidVideo lesson
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85How Einstein derives Maxwell equations in covariant formVideo lesson
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86How Einstein shows that his theory of GR reduces to Newtonian physicsVideo lesson
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87How Einstein calculates the deflection of a light ray due to gravityVideo lesson

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