PPT-Optics and Human Vision The physics of light

httpcommonswikimediaorgwikiFileEyediagrambgsvg Light Light Particles known as photons Act as waves Two fundamental properties Amplitude Wavelength Frequency is the inverse of wavelength. •The Eye: Vision variants and Correctionhttp://www.colorado.edu/physics/phys1230 Levels of Vision * 20/20 -Normal vision. Fighter pilot minimum. Required to read the stock quotes in the newspaper The physics of light. http://commons.wikimedia.org/wiki/File:Eye-diagram_bg.svg . Light. Light. Particles known as photons. Act as ‘waves’. Two fundamental properties. Amplitude. Wavelength . Frequency is the inverse of wavelength. vision. The eye is essentially an opaque eyeball filled with a water-like fluid. . In . the front of the eyeball is a transparent opening known as the . cornea. , a . thin membrane . with an . index of refraction of approximately 1.38. The cornea has the dual purpose of protecting the eye and refracting light as it enters the eye. . for. 1. st. year Physics . Honours. Course. By . Arnab. . Gangopadhyay. . Light. The . light. , . with which we see, is a small part of the vast spectrum of electro magnetic field.. Interaction of light with matter divided into three regimes.. James Tompkin. Many slides thanks to James Hays’ old CS 129 course, . along with all of its acknowledgements.. Canny edge detector. Filter image with x, y derivatives of Gaussian . Find magnitude and orientation of gradient. Light travels in a STRAIGHT LINE . ANOTHER WAY TO THINK OF LIGHT. Light leaving the candle travels in all directions, but we only SEE the light that travels in to our Eye-Brain. ANOTHER WAY TO THINK OF . they are: Geometrical optics - this area of optics operates on the primary assumption that light travels in a straight line. Although this is an abstraction of reality, it nevertheless permits rathe Light rays are (reflected) when they pass from one medium into a medium of a different density, except when they strike perpendicular to the interface. Convex Lens (. (عدسات محدبة . focuses light rays (which is called convergence of light rays).. Optics of Vision . Optics of Vision . Refraction power a lens “Diopter” = 1 m / focal length. Optics of Vision . Optics of Vision . Picture Formation. cataracts . (opacities in the lens). Picture Formation. Most of our knowledge of the world around us comes to us through our . eyes. . The helplessness we feel when caught in the dark in unfamiliar surroundings is a good indication of our dependence on . Raytracing. Lecture 7: Optics. UCSD Physics 122. 2. Reflection. We describe the path of light as straight-line rays. “geometrical optics” approach. Reflection off a flat surface follows a simple rule:. Dr. Steve Peterson. Steve.peterson@uct.ac.za. OPTICS. Chapter . 23. : . Geometric Optics. In this section, we will use the . ray model of light . to understand the formation of images by . mirrors. and . Axel Lindner . DESY . Any Light Particle Search II. IAXO workshop, . Frascati. , 18 April 2016. ALPS II motivation: a bibliometric look. Key words “. axion. ”, “. relaxion. ”, “. axion. -like particle”, “WISP”. Annual Workshop. 16 January 2018. a. a. ALPS . IIc. in the HERA tunnel. Brief scientific motivation. Light-shining-through-walls with resonant regeneration and. s. tatus of ALPS II at DESY. JURA: exploiting the power of modern dipole magnets.