colours and filters

• what does a prism do

  splits a ray of white light into 7 colours; the colours of the rainbow
• what is the process called where a prism splits a ray of white light into the colours of the rainbow


  dispersion
• what is a spectrum

  the colours that make up white
• what are the colours of the rainbow

  red, orange, yellow, green, blue, indigo, violet; ROY G BIV
• what colour refracts the most

  purple
• what colour bends the least

  red
• what colour travels the slowest

  purple
• what colour travels the fastest

  red
• what colour is known as the absense of light

  black
• what colour is known as the mixture of all the colours


  white
• what are the primary colours of light

  blue, green, red
• what does blue and red make

  magenta
• what does blue and green make

  cyan
• what does red and green make

  yellow