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Geometric Optics - General Physics - Lecture Notes, Study notes of Physics

Cochin University of Science and TechnologyPhysics

This algebra-based course covers basic concepts of physics including practical examples of the role of physics in other disciplines. The course is designed to develop physical intuition and problem-solving skills. This lecture includes: Geometric Optics, Wavefronts, Light Rays, Em Wave, Ray Model of Light, Plane Wave, Light Reflection from Flat Surfaces, Angle of Incidence, Angle of Reflection, Law of Reflection

Typology: Study notes

2012/2013

Uploaded on 08/30/2013

faroq
faroq 🇮🇳

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Geometric Optics: Ray Model of Light
Light sources emit light (EM wave) in all directions.
Wavefronts—an expanding spherical EM wave of
light with crests and troughs (radius of wave
increases with time).
Light Rays—straight-line paths indicating direction of
wave fronts. They are perpendicular to wave fronts.
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Geometric Optics: Ray Model of Light

Light sources emit light (EM wave) in all directions. Wavefronts—an expanding spherical EM wave of light with crests and troughs (radius of wave increases with time). Light Rays—straight-line paths indicating direction of wave fronts. They are perpendicular to wave fronts.

Plane wave—wavefronts that are equidistant parallel planes with light rays perpendicular to these planes.

Diffuse reflection—light beam incident on microscopically rough surface is reflected in many directions Specular reflection—light beam incident on microscopically smooth (mirror) surface is reflected as a beam satisfying law of reflection

Diffuse Reflection

Specular Reflection

Plane Mirror

Mirror-highly reflecting metallic coating on a flat glass surface

  1. Virtual Image—image produced by non- intersecting reflected rays (if a screen is placed behind the mirror, no image would appear on screen)
  2. Erect Image—direction of height of image is same as object. However, right hand of object is left hand of image
  3. Image size equals object size (hi=ho )
  4. Image distance equals object distance (d (^) i=do )

hh i