PHYS 1070 Lecture Notes - Lecture 9: Refraction, Virtual Image
25 Mar 2015
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Document Summary
Phys1070: intro physics for life sci - lecture 9: refraction at spherical surfaces. For planar surfaces the emergent beam is parallel to the incident beam if the same medium is on both sides of glass. If the incidence angle is not zero there"s just a slight displacement which is usually too small to notice. You can never form an image with such a system even if you bend the glass (the sides remaining parallel) There is no deviation of the outgoing ray. Any ray perpendicular to the surface ( =0) passes through the centre of curvature. Snell"s law bends light towards the normal n2>n1. This curved surface refracts light so that the rays pass through one point (not necessarily at the centre) The intersection of the refracted beams is where the image forms. Where p is the object distance from the refracting surface. Q is the image distance from the refracting surface.
