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PANCHAYAT UNION MIDDLE SCHOOL, VISWANATHAM
SIVAKASI UNION,
VIRUDHUNAGAR DISTRICT,
TAMILNADU STATE, INDIA-626124.
CELL NO 97510-45246.                         Exit
Dispersion

Dispersion of White light
Colours

Colour Filters                      Home
Mixing Colour or Spectral Colours

Colour Blindness – An Activity

Mixing of Colours – An Activity

Newtons’ Colour Disc                       PHYSICS
The phenomenon by which a ray of light splits into its
constituent colours when 00is passed through a
                         it
transparent medium is known as dispersion.




                                                         Red
                                                         Orange   Range of
                                                         Yellow   Visible
                                                         Green    Spectrum
                                                         Blue     0.4 microns to
                                                         Indigo
                                                                  0.7 microns
                                                         Violet




   Spectrum is the band of colours obtained due to
   the dispersion of Light.                                            Rainbow
Sun


        Sun light




      Rainbow
Pigment is an optically active substance which may be synthetic or of
Mineral animal or vegetable origin.
Pigment is sensation produced in the brain due to the excitation of retina, by
Colour is a an optically active substance which may be synthetic or of
Mineral animal or vegetable origin.
electromagnetic waves.

The range of wavelength of these waves is 4000Å to 8000Å

Angstrom (Å) : It is the unit used to measure wavelength of electromagnetic
radiation.   1 Å =10-10 m =10-8 cm
Red
                         Orange
                         Yellow
                         Green
                         Blue
                         Indigo
                         Violet




Primary Colours




      Red         Blue     Green
The Primary colours are the
                                          white light.
Colours which when mixed
in equal proportions
give white light.
         ctor




                              Projector




                                                        r
                                                     cto
          je




                                                  oje
       Pro




                                                      Pr
The colours obtained by the mixing two primary colours are called
  Secondary Colors




Secondary Colours




    Cyan                         Magenta                      Yellow
Pro
    je   ctor
                  Red + Green = Yellow




Projector
                Yellow




           r
        cto
Pr   oje
Red + Blue = Magenta               Magenta


     ctor




                       Projector




                                              r
                                           cto
      je




                                        oje
   Pro




                                             Pr
Pro
    je   ctor
                Green + Blue = Cyan




Projector




           r
        cto
Pr   oje
                Cyan
The Secondary colours are obtained by projecting light of one colour on the other
and the rocess is known as colour mixing by addition. The colurs thus obtained are
called additive colours




                                    Cyan                        Magenta
     Yellow
Complementary Colours can be defined as pair of colours one primary and other
secondary colour, which on mixing forms white light.
Secondary Colours are known as subtractive primaries as they are obtained by
subtracting one of the primary colours from white light.




                                                                  White
      White                            White
Yellow + Green = White               White


     ctor




                         Projector




                                                   r
                                                cto
      je




                                             oje
   Pro




                                                 Pr
Pro
    je   ctor
                Green + Cyan = White




Projector




           r
        cto
                      White




Pr   oje
Pro
    je   ctor
                Red + Cyan = White




Projector
                           White




           r
        cto
Pr   oje
Colour Triangle


Primary Colours                                               Secondary Colours

      Red                                                            Magenta

     Green                                                            Yellow

      Blue                                                             Cyan




                                      Cyan

  The order of the colours is such that the sum of any two primary colours at the
  Corners gives the secondary colors between them.
  The sum of the primary colour on the vertex and the secondary colour on the side
  opposite to the vertex produces white light.
The Rod shaped cells are sensitive to brightness of light. The Cone shaped cells
orRetina : The retina, the colours.of the human eye, Consists ofsensitive andnumber
   cones are sensitive to screen There are red sensitive, blue a very large
green sensitive cones. Colourare rod shaped cells and cone shaped cells.cones
  of light sensitive cells. They blind people have less number of particular
than people with normal vision. Hence they get colour confused.


                                               Retina      Rod shaped Cells




                                                          Cone shaped Cells
If you see the No 12. your vision is normal else not.
Look at this picture and click on the number you see.


    a) 21        b) 24       c ) 74      d) No number
You have a red green Confusion.
                          Next
You Don’t have a red green Confusion.

                                Next
Look at this picture and click on the number you see.


    a) 21        b) 24       c ) 74      d) No number
You have a colour deficiency .
                           Next
You Don’t have a colour deficiency .
                                  Next
ON                  ON                          ON




     Switch on the light and then click on the appropriate colour




               Click the Correct colour
ON          ON                         ON




     Click on the appropriate colour
ON           ON                        ON




     Click on the appropriate colour




                                            Next
ON           ON                        ON




     Click on the appropriate colour
Home




Continue
Home




Continue
Continue
Home




Continue

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Panchayat Union Middle School Details

  • 1. PANCHAYAT UNION MIDDLE SCHOOL, VISWANATHAM SIVAKASI UNION, VIRUDHUNAGAR DISTRICT, TAMILNADU STATE, INDIA-626124. CELL NO 97510-45246. Exit
  • 2. Dispersion Dispersion of White light Colours Colour Filters Home Mixing Colour or Spectral Colours Colour Blindness – An Activity Mixing of Colours – An Activity Newtons’ Colour Disc PHYSICS
  • 3. The phenomenon by which a ray of light splits into its constituent colours when 00is passed through a it transparent medium is known as dispersion. Red Orange Range of Yellow Visible Green Spectrum Blue 0.4 microns to Indigo 0.7 microns Violet Spectrum is the band of colours obtained due to the dispersion of Light. Rainbow
  • 4. Sun Sun light Rainbow
  • 5.
  • 6. Pigment is an optically active substance which may be synthetic or of Mineral animal or vegetable origin.
  • 7. Pigment is sensation produced in the brain due to the excitation of retina, by Colour is a an optically active substance which may be synthetic or of Mineral animal or vegetable origin. electromagnetic waves. The range of wavelength of these waves is 4000Å to 8000Å Angstrom (Å) : It is the unit used to measure wavelength of electromagnetic radiation. 1 Å =10-10 m =10-8 cm
  • 8. Red Orange Yellow Green Blue Indigo Violet Primary Colours Red Blue Green
  • 9. The Primary colours are the white light. Colours which when mixed in equal proportions give white light. ctor Projector r cto je oje Pro Pr
  • 10. The colours obtained by the mixing two primary colours are called Secondary Colors Secondary Colours Cyan Magenta Yellow
  • 11. Pro je ctor Red + Green = Yellow Projector Yellow r cto Pr oje
  • 12. Red + Blue = Magenta Magenta ctor Projector r cto je oje Pro Pr
  • 13. Pro je ctor Green + Blue = Cyan Projector r cto Pr oje Cyan
  • 14. The Secondary colours are obtained by projecting light of one colour on the other and the rocess is known as colour mixing by addition. The colurs thus obtained are called additive colours Cyan Magenta Yellow
  • 15. Complementary Colours can be defined as pair of colours one primary and other secondary colour, which on mixing forms white light. Secondary Colours are known as subtractive primaries as they are obtained by subtracting one of the primary colours from white light. White White White
  • 16. Yellow + Green = White White ctor Projector r cto je oje Pro Pr
  • 17. Pro je ctor Green + Cyan = White Projector r cto White Pr oje
  • 18. Pro je ctor Red + Cyan = White Projector White r cto Pr oje
  • 19. Colour Triangle Primary Colours Secondary Colours Red Magenta Green Yellow Blue Cyan Cyan The order of the colours is such that the sum of any two primary colours at the Corners gives the secondary colors between them. The sum of the primary colour on the vertex and the secondary colour on the side opposite to the vertex produces white light.
  • 20.
  • 21.
  • 22. The Rod shaped cells are sensitive to brightness of light. The Cone shaped cells orRetina : The retina, the colours.of the human eye, Consists ofsensitive andnumber cones are sensitive to screen There are red sensitive, blue a very large green sensitive cones. Colourare rod shaped cells and cone shaped cells.cones of light sensitive cells. They blind people have less number of particular than people with normal vision. Hence they get colour confused. Retina Rod shaped Cells Cone shaped Cells
  • 23. If you see the No 12. your vision is normal else not.
  • 24. Look at this picture and click on the number you see. a) 21 b) 24 c ) 74 d) No number
  • 25. You have a red green Confusion. Next
  • 26. You Don’t have a red green Confusion. Next
  • 27. Look at this picture and click on the number you see. a) 21 b) 24 c ) 74 d) No number
  • 28. You have a colour deficiency . Next
  • 29. You Don’t have a colour deficiency . Next
  • 30. ON ON ON Switch on the light and then click on the appropriate colour Click the Correct colour
  • 31. ON ON ON Click on the appropriate colour
  • 32. ON ON ON Click on the appropriate colour Next
  • 33. ON ON ON Click on the appropriate colour