So we're gonna focus on what happens when a ray of lightįalls on such a medium. Sides, or its sides, are parallel to each other. Glass, it can be any medium as long as its opposite Opposite sides of this piece are parallel to each other and so this is an example for parallel sided medium. Rectangular piece of glass, a very long rectangular piece of glass. What's a parallel sided medium? Well, let's take an example. Why do you think is that happening? In this video we're going toįocus on refraction through parallel sided media. → incident & emergent rays are parallel to each other.- If you look at the drawing of this dude through a glass slab, then you see that his bodyĪppears to be shifted. (iv) Lateral shift is inversely proportional to the wavelength of incident light.įor light going from air to glass at point E.įor light going from glass to air at point F. (iii) Lateral shift is directly proportional to the refractive index of glass slab. (ii) Lateral shift is directly proportional to the incident angle. (i) Lateral shift is directly proportional to the thickness of glass slab. Lateral shift is the perpendicular distance between the incident and emergent rays when light is incident obliquely on a refracting slab with parallel faces.įactors on which lateral shift depends are : There is shift in the path of light on emerging from a refracting medium with parallel faces.
Thus the emergent ray FD is parallel to the incident rays AE, but it has been laterally displaced with respect to the incident ray. The emerged ray FD bends away from the normal at an angle of refraction e. The refracted ray EF is incident on face SR at an angle of incidence r'. On entering the glass slab, it bends towards normal and travels along EF at an angle of refraction r.
A ray AE is incident on the face PQ at an angle of incidence i. (a) Refraction through a rectangular glass slab and principle of reversibility of light :Ĭonsider a rectangular glass slab, as shown in figure. Engineering - Data Structure & Algorithms.
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