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Geometrical optics, studied in the first year, ignored the wave nature of light and so, in this course, we focus particularly on Physical Optics where the primary characteristic of waves viz. interference, is the dominant theme. It is interference that causes diffraction – the bending of light around obstacles.
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drawing the “wave fronts”, which are usually taken to be the crests of the wave. In the case of Figure 1.1 the wave fronts are circular, as shown below the wave plot. 1.1.2 Evidence for wave properties of light There are certain things that only waves can do, for example interfere. Ripples in a pond caused
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Light is absorbed (propagation is stopped) Medium is opaque. If light wave frequency ≠ molecules resonant frequency. Light is reradiated and propagated forward through medium. Medium is transparent. In a solid or liquid, propagation is in straight line. In a gas, propagation is less organized and scatter increases.
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Wave Nomenclature. λ. A. Wave is travelling from left to right with a velocity (V) The wavelength (λ) is the distance between successive wave crests. The amplitude (A) is the height of the wave. The frequency is the number of wave crests per second which pass a reference point. Frequency is expressed as cycles per second or Hertz (Hz).
Oct 17, 2014 · The energy of light is related to its frequency and velocity as follows: E = hν = hC/λ. where E = energy. h = Planck's constant, 6.62517 x 10-27 erg.sec ν = frequency. C = velocity of light = 2.99793 x 1010 cm/sec λ = wavelength. The velocity of light, C, in a vacuum is 2.99793 x 1010cm/sec. Light cannot travel faster than this, but if it ...
e Teacher:“Light” (more precisely, visible light) is the type of electromagnetic radiation that is detectable by the. uman eye. Light, as with all matter, can be described either as a wave or as a particle (a . hoton”). On this page we will describe some of the wave behaviors.
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Properties of Light 9 CHRISTIAN HUYGENS One of the foremost scientists of the seventeenth century and a contemporary of Isaac Newton, Christian Huygens was born on April 14, 1629 in The Hague, Holland. His brilliance is obvious from a long list of concept inventions and equipment inventions. To name a few we place on record: wave theory of ...
