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Savera passed a beam of white light through a series of equilateral prisms as shown.

(a) What colour(s) will be seen on the screen? 

(b) Copy the diagram above and draw the beam entering Prism 1 and emerging from Prism 3 and falling on the screen. 

(c) Name all the processes that takes place when the beam of light enters the Prism 1 and emerges from Prism 3.

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  • violet 
  • indigo 
  • blue 
  • green 
  • yellow 
  • orange
  • red
(c)  dispersion and refraction