The Doppler Effect When a source of sound, such as the whistle of a train or the siren of an ambulance, moves?away?from an observer: It appears to?decrease?in frequency, i.e. it sounds?lower?in pit...
Resolvance of Diffraction Gratings In order to know if a diffraction grating is able to resolve two wavelengths, the?resolving power?of the diffraction grating must be found This is based on the?Ra...
Rayleigh Criterion Calculations The Rayleigh Criterion can be mathematically described by considering?angular separation?and?single-slit diffraction Angular separation can be calculated using the e...
Diffracting Aperture A circular aperture allows a cone of light to enter a region behind the aperture Examples of circular aperture include: A lens within an optical device such as a camera The pup...
Thin Film Interference Thin film interference causes the iridescence seen in: Nature on peacock feathers Glossy flower petals Soap bubbles The shiny side of a CD Thin layers - or films - of oil on ...
有些學(xué)生籠統(tǒng)的把GCSE大考比作中考。但就重要性而言，GCSE大考成績(jī)可比國(guó)內(nèi)的中考成績(jī)要重要許多。A-level課程成績(jī)直接決定小伙伴們能否有資格申請(qǐng)英國(guó)大學(xué)。如果小伙伴們?cè)贕CSE階段有過(guò)相關(guān)課程的學(xué)習(xí)經(jīng)驗(yàn)和知識(shí)...
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...
