Edexcel A Level Physics:复习笔记10.6 Doppler Shift
Doppler Shift If a wave source is stationary, the wavefronts spread out symmetrically If the wave source is moving, the waves can become squashed together or stretched out If the wave source is mov...
2023himcm竞赛报名时间将截止，如何备赛？
抓紧时间，下半年可以报名的国际学术活动不多了，疫情之下，各项规划都变得非常谨慎，大家一定要注意时间节点。2023himcm学术活动报名时间将截止，你报名了吗？你是如何备赛的？ 报名截止日期：2022年11月2日14:0...
Edexcel A Level Physics:复习笔记10.5 The Life Cycle of Stars
The Life Cycle of Stars The life cycle of stars go in predictable stages The exact route a star's development takes depends on its initial mass Initial Stages for All Masses The first four stages i...
Edexcel A Level Physics:复习笔记10.4 The Hertzsprung-Russell Diagram
The Hertzsprung - Russell Diagram Danish astronomer Ejnar Hertzsprung, and American astronomer Henry Noris Russell, independently plotted the luminosity of different stars against their temperature...
Edexcel A Level Physics:复习笔记10.3 Standard Candles
Determining distance using standard candles Standard Candles A standard candle is defined as: An astronomical object which has a known luminosity due to a characteristic quality possessed by that c...
Edexcel A Level Physics:复习笔记10.2 Parallax
Determining Distance using Parallax The principle of parallax is based on how the position of an object appears to change as the position of the observer changes For example, when observing the sca...
Edexcel A Level Physics:复习笔记10.1 Inverse Square Law of Flux
Inverse Square Law of Flux The moment the light leaves the surface of the star, it begins to spread out uniformly through a spherical shell Light sources which are further away appear fainter becau...
Edexcel A Level Physics:复习笔记9.12 Wien’s Law
Wien's Law Wien’s displacement law relates the observed wavelength of light from an object to its surface temperature, it states: The black body radiation curve for different temperatures peaks at ...
Edexcel A Level Physics:复习笔记9.11 Stefan-Boltzmann Law
Stefan-Boltzmann Law An objects luminosity depends on two factors: Its surface temperature Its surface area The relationship between these is known as the Stefan-Boltzmann Law, which states:...
Edexcel A Level Physics:复习笔记9.10 Black Body Radiation
Black Body Radiation Black body radiation is the name given to the thermal radiation emitted by all bodies (objects) All objects, no matter what temperature, emit black body radiation in the form o...
Edexcel A Level Physics:复习笔记9.9 Average Molecular Kinetic Energy
Average Molecular Kinetic Energy An important property of molecules in a gas is their average kinetic energy This can be deduced from the ideal gas equations relating pressure, volume, temperature ...
Edexcel A Level Physics:复习笔记9.8 Core Practical 14: Investigating Gas Pressure & Volume
Investigating Gas Pressure and Volume Boyle's Law relates pressure and volume at constant temperature This investigation is one valid example of how this required practical might be tackled, others...
