PHYS 251 Chapter Notes - Chapter 18.5: Cornea, Aqueous Humour, Optical Axis
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Physics 251 reading notes: 18. 5 thin lenses: ray tracing. Lens: transparent material that uses refraction of light rays at curved surfaces to form its image. Converging lens: causes the rays to refract towards the optical axis. All incoming rays that are initially parallel to the optical axis converge at the same point, the focal point of the lens. The distance of the focal point from the lens is called the focal length (f) of the lens. The focal point on the side from which the light is coming is the near focal point and the focal point on the other side of the lens is the far focal point. Diverging lens: causes the rays to refract away from the optical axis. All rays appear to have started from the same point (the focal point) Mathematical expression that relates the three fundamental quantities of an optical system. The focal length (f) of the lens of mirror.
