Edexcel IGCSE Physics 复习笔记 8.3.3 Galactic Red-shift
Edexcel IGCSE Physics 复习笔记 8.3.3 Galactic Red-shift Galactic Red-shift The Doppler effect affects all types of waves, including light Light emitted from stars and galaxies will be at a c...
Edexcel IGCSE Physics 复习笔记 8.3.2 Doppler Shift
Edexcel IGCSE Physics 复习笔记 8.3.2 Doppler Shift The Doppler Effect Usually, when an object emits waves, the wavefronts spread out symmetrically If the wave source moves, the waves can bec...
Edexcel IGCSE Physics 复习笔记 8.3.1 The Big Bang Theory
Edexcel IGCSE Physics 复习笔记 8.3.1 The Big Bang Theory The Big Bang Theory Around 14 billion years ago, the Universe began from a very small region that was extremely hot and dense Then th...
Edexcel IGCSE Physics 复习笔记 8.2.5 Hertzsprung-Russell Diagrams
Edexcel IGCSE Physics 复习笔记 8.2.5 Hertzsprung-Russell Diagrams Hertzsprung-Russell Diagrams Stars are classified using the Hertzsprung-Russell (HR) diagram This is a plot of: The luminosi...
Edexcel IGCSE Physics 复习笔记 8.2.4 The Brightness of Stars
Edexcel IGCSE Physics 复习笔记 8.2.4 The Brightness of Stars Absolute Magnitude Astronomers measure the brightness of stars at a standard distance using the absolute magnitude scale This is ...
IB DP Maths: AI HL复习笔记5.7.2 Second Order Differential Equations
Euler's Method: Second Order How do I apply Euler’s method to second order differential equations? A second order differential equation is a differential equation containing one or more second deri...
Edexcel IGCSE Physics 复习笔记 8.2.3 The Life Cycle of Larger Stars
Edexcel IGCSE Physics 复习笔记 8.2.3 The Life Cycle of Larger Stars The Life Cycle of Larger Stars A large star is one that is much larger than the Sun Stars that are larger than the Sun hav...
Edexcel IGCSE Physics 复习笔记 8.2.2 The Life Cycle of Solar Mass Stars
Edexcel IGCSE Physics 复习笔记 8.2.2 The Life Cycle of Solar Mass Stars The Life Cycle of Solar Mass Stars 1. Nebula All stars form from a giant cloud of hydrogen gas and dust called a nebul...
Edexcel IGCSE Physics 复习笔记 8.2.1 Classification of Stars
Edexcel IGCSE Physics 复习笔记 8.2.1 Classification of Stars Classification of Stars Stars come in a wide range of sizes and colours, from yellow stars to red dwarfs, from blue giants to red...
