Prisms total internal reflection polarization how we see color how vision is corrected and rainbows
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Prisms, total internal reflection, polarization, how we see color, how vision is corrected and rainbows. Prisms. High frequency light in a transparent medium travels slower than low frequency light (red light travels faster than violet light)

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Prisms total internal reflection polarization how we see color how vision is corrected and rainbows

Prisms, total internal reflection, polarization, how we see color, how vision is corrected and rainbows.


Prisms
Prisms color, how vision is corrected and rainbows.

  • High frequency light in a transparent medium travels slower than low frequency light (red light travels faster than violet light)

  • Thus, the different colors are refracted at different angles.

  • When white light is refracted twice, and the second surface is not parallel to the first, the dispersion is noticeable, thus the colors are observed.

  • If the two boundaries of the medium are parallel, the refractive effects at the first boundary are reversed at the second boundary.


Total internal reflection
Total Internal Reflection color, how vision is corrected and rainbows.

  • Light can be reflected off a transparent medium boundary at a certain angle.

  • This angle is called the critical angle.

Fiber Optics


Optical Fibers color, how vision is corrected and rainbows.

29.12Total Internal Reflection

Optical fibers, sometimes called light pipes, are transparent fibers that pipe light from one place to another.

They do this by a series of total internal reflections.

Optical fibers are useful for getting light to inaccessible places.

Mechanics and machinists use them to look at the interiors of engines, and physicians use them to look inside a patient’s body.


Total internal reflection1
Total Internal Reflection color, how vision is corrected and rainbows.


Total internal reflection2
Total Internal Reflection color, how vision is corrected and rainbows.

  • http://www.phy.ntnu.edu.tw/java/optics/path_e.html

  • http://micro.magnet.fsu.edu/primer/java/refraction/criticalangle/index.html


Polarization of light
Polarization of Light color, how vision is corrected and rainbows.

  • Light consists of waves vibrating in all planes (360o).

  • A polarizer allows only the light wave along one plane to pass through.

  • Two polarizers if oriented at right angles will cancel all light.

  • Glare (reflected light polarized in a plane parallel to a non-metallic surface) is greatly reduced when using polarized lenses.

  • http://lectureonline.cl.msu.edu/~mmp/kap24/polarizers/Polarizer.htm


28.1 color, how vision is corrected and rainbows.The Color Spectrum

When sunlight passes through a prism, it separates into a spectrum of all the colors of the rainbow.

roygbiv


Isaac newton discovered that white light is composed of seven different colors of light
Isaac Newton—discovered that white light is composed of seven different colors of light

Dispersion of white light into component colors

Red

Orange

Yellow

Green

Blue

Violet

White Light

A prism disperses white light into its primary frequencies of color


R Nave seven different colors of light

http://hyperphysics.phy-astr.gsu.edu/hbase/ems3.html


Prisms1
Prisms seven different colors of light

  • http://www.physics.mun.ca/~jjerrett/dispersion/prism.html

  • http://micro.magnet.fsu.edu/primer/java/prism/index.html


Rainbows etc
Rainbows, etc. seven different colors of light

  • http://mysite.verizon.net/vzeoacw1/rainbow.html

  • http://micro.magnet.fsu.edu/primer/java/refraction/refractionangles/index.html


Refraction
Refraction seven different colors of light

  • http://freespace.virgin.net/gareth.james/virtual/Optics/Refraction/refraction.html

    http://www.physicsclassroom.com/Class/refrn/u14l1f.html



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