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...
眾所周知，雅思寫作題庫會重復。每隔一段時間，雅思就會拿出舊題再利用。特別是近年來，受疫情影響，雅思題庫更新緩慢，重復率更高。舊題再現已經逐漸成為考試常態。 為了幫助大家知己知彼，更好地準備雅思寫作，...
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...
中學生的詞匯量一般不低，但閱讀英語原版書籍仍然很困難。這是因為中國和美國的學生閱讀量差異很大。要有扎實的英語技能，除了記憶單詞外，還要注意閱讀。 通過課外閱讀來提升學生的學習興趣，進而提高詞匯量是值...
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...
Earth's Surface–Atmosphere System It is useful to consider Earth’s energy balance in terms of how much incoming energy from the Sun is used and how much is returned to space If incoming and outgoin...
