Refraction The bending of waves as they pass

$Refraction The bending of waves as they pass from one medium to another$

Refraction The bending of waves as they pass from one medium to another

$Refraction • http: //online. cctt. org/physicslab/content/Ph y 1/lessonnotes/refractionoflight/refraction. asp$

Refraction • http: //online. cctt. org/physicslab/content/Ph y 1/lessonnotes/refractionoflight/refraction. asp

$Refraction • The bending of light as it passes from one medium to another.$

Refraction • The bending of light as it passes from one medium to another. • Dependent upon – Change in light wave speed – Change in direction • Bending means an abrupt change in direction.

$Refraction—the cause • Waves change speed as they pass through different mediums – Mechanical$

Refraction—the cause • Waves change speed as they pass through different mediums – Mechanical waves travel fastest through solids, slowest through gases and not at all through space. – Electromagnetic waves (or light waves) travel fastest through space and slowest through (transparent or translucent) solids.

$Refraction • The bending of light as it passes from one medium to another.$

Refraction • The bending of light as it passes from one medium to another. • Dependent upon – Change in light wave speed – Change in direction • Bending means an abrupt change in direction.

For Light Waves • Light waves slow down as they move from air to water or from air to glass. • Light waves speed up as they move from water to air or from glass to air. Fastest through air Faster through water Fastest through air Slowest through glass

$Refraction air Glass or water http: //astrophys-assist. com/educate/solarobs/ses 01 p 05. htm air$

Refraction air Glass or water http: //astrophys-assist. com/educate/solarobs/ses 01 p 05. htm air

Less dense to more dense • Give three possibilities about what Medium 1 and Medium 2 could be to make this diagram true. • First possibility air • Medium 1 ____ water • Medium 2 ____ • Second possibility air • Medium 1 ____ glass • Medium 2 ____ • Third possibility water • Medium 1 ____ glass • Medium 2 ____

More dense to less dense • Give three possibilities about what Medium 1 and Medium 2 could be to make this diagram true. • First possibility • Medium 1 ____ • Medium 2 ____ • Second possibility • Medium 1 ____ • Medium 2 ____ • Third possibility • Medium 1 ____ • Medium 2 ____ • Give three possibilities about what Medium 1 and Medium 2 could be to make this diagram true. • First possibility water • Medium 1 ____ air • Medium 2 ____ • Second possibility glass • Medium 1 ____ water • Medium 2 ____ • Third possibility • Medium 1 ____ glass air • Medium 2 ____

Convex and Concave Lenses convergent divergent http: //cache. eb. com/eb/image? id=85238&rend. Type. Id=34

The Human Eye and Sight • What type of lens is a magnifying glass? • Convergent convex • Examples of objects that use convex lenses to focus the image – Telescopes, Microscopes, Cameras, – The human eye

Telescope or microscope

Cameras Camera uses a convex lens

Human eye contains two convex lenses 1. The cornea 2. The (secondary) lens Light must be refracted through both lenses before it will focus on the retina. http: //www. physics 247. com/physics-tutorial/eye-anatomy. jpg http: //upload. wikimedia. org/wikipedia/commons/thumb/1/1 e/Schematic_diagram_of_the_human_eye_en. s vg/508 px-Schematic_diagram_of_the_human_eye_en. svg. png

http: //www. selectspecs. com/info/structure-of-the-eye