Properties of Waves

Dispersion of light

1. What are the primary colors?
   Red, green and blue are known as primary colors.
   
   
2. Why red, green and blue are called  primary colors?
   Because when they are added together white light is formed.
   
3. How do we obtain secondary colors?
   By mixing primary colors in pairs we obtain secondary colors. 
   
4. What are the secondary colors?
   Red and green produce yellow. 
   Blue and red produce magenta 
   blue and green produce cyan.
   

5. What are the colors of light?
   Red, orange, yellow, green, blue, indigo, violet  
   

6. What is meant by a monochromatic light (single component)?
   A single wave with single frequency and wavelength.  
   

7. What is meant by a polychromatic light (compound component)?
   A light which is constructed from single light components  
   

8. Is white light a monochromatic or a polychromatic?
   It is a polychromatic light.  
   

9. What is meant by dispersion of light?
   It means the separation of the light components.  
   

10. How do we isolate the color components of white light? Using prism
     

11. The white color components are called the visible spectrum. Why?  Because all the color can be seen by the human eye.

12. List the color components of light spectrum in order.
    Red, orange, yellow, green, blue, indigo, violet

13. What is meant by a continuous spectrum?
    When the spectrum colors are projected on a screen they have no separation distance and thus they are continuous.

14. While reading a book, by some eyeglasses we view some colors at the edges of text. Why?
    Because white light is dispersed by the eyeglass into the eye into its color components.