The Diffraction Grating Equation The angles at which the maxima of intensity (constructive interference) are produced can be deduced by the diffraction grating equation: The lines per m (or per mm,...
Diffraction Grating Patterns A diffraction grating is a plate consisting of a very large number of parallel, identical, close-spaced slits When monochromatic light is incident on a grating, a patte...
Two-Slit Interference Patterns For two-source interference fringes to be observed, the sources of the wave must be: Coherent (constant phase difference) Monochromatic (single wavelength) When two w...
众所周知，雅思写作题库会重复。每隔一段时间，雅思就会拿出旧题再利用。特别是近年来，受疫情影响，雅思题库更新缓慢，重复率更高。旧题再现已经逐渐成为考试常态。 为了帮助大家知己知彼，更好地准备雅思写作，...
Young’s Double-Slit Experiment Young’s double-slit experiment demonstrates how light waves can produce an interference pattern The setup of the experiment is shown below: Young’s double-slit experi...
Intensity of Interference Maxima & Minima Using different sources of monochromatic light demonstrate that: Increasing the wavelength increases the width of the fringes The angle of diffraction ...
The Nature of Single-Slit Diffraction When plane waves are incident normally on a single slit, a diffraction pattern is produced This is represented as a series of light and dark fringes which show...
中学生的词汇量一般不低，但阅读英语原版书籍仍然很困难。这是因为中国和美国的学生阅读量差异很大。要有扎实的英语技能，除了记忆单词外，还要注意阅读。 通过课外阅读来提升学生的学习兴趣，进而提高词汇量是值...
Period of a Simple Pendulum & a Mass-Spring System Two examples of simple harmonic oscillators are: A simple pendulum A mass-spring system Considering equations related to the restoring force l...
Calculating Energy Changes in SHM There are many equations to learn in the topic of simple harmonic motion The key equations are summarised below: A summary of the equations related to simple harmo...
Energy Changes in SHM During simple harmonic motion, energy is constantly exchanged between two forms: Kinetic energy Potential energy The potential energy could be in the form of: Gravitational po...
The Defining Equation of SHM Simple harmonic motion (SHM) is a fundamental oscillation which appears naturally in various phenomena, including: The swing of a pendulum A mass on a spring Guitar str...
