WAEC Physics questions: Dispersion of light and colours

10 questions with answers and explanations. Tap an option to check yourself.

1. Question 1· Dispersion of light and colours· WAEC

   A red object viewed in pure blue light appears

   • Ared
   • Bblack
   • Cblue
   • Dwhite

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   Explanation and discussion

2. Question 2· Dispersion of light and colours· WAEC

   When white light passes through a prism, the colour deviated most is

   • Ayellow
   • Bred
   • Cgreen
   • Dviolet

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   Explanation and discussion

3. Question 3· Dispersion of light and colours· WAEC

   White light is split into colours by a prism because

   • Alight is reflected
   • Bthe prism adds colour
   • Ceach colour is refracted by a different amount
   • Dthe colours are absorbed

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   Explanation and discussion

4. Question 4· Dispersion of light and colours· WAEC

   A green leaf appears green in white light because it

   • Aemits green light
   • Babsorbs green light
   • Creflects green light and absorbs the others
   • Drefracts green light

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   Explanation and discussion

5. Question 5· Dispersion of light and colours· WAEC

   The splitting of white light into its component colours is called

   • Areflection
   • Bdiffraction
   • Cdispersion
   • Dinterference

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   Explanation and discussion

6. Question 6· Dispersion of light and colours· WAEC

   Blue light and yellow light mixed together give

   • Ablack
   • Bgreen light
   • Cwhite light
   • Dorange light

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   Explanation and discussion

7. Question 7· Dispersion of light and colours· WAEC

   Which colour of light is deviated most by a glass prism?

   • Ayellow
   • Bred
   • Cviolet
   • Dgreen

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   Explanation and discussion

8. Question 8· Dispersion of light and colours· WAEC

   A red object viewed in blue light appears

   • Ared
   • Bblue
   • Cwhite
   • Dblack

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   Explanation and discussion

9. Question 9· Dispersion of light and colours· WAEC

   The band of colours obtained when white light passes through a prism is called a

   • Aimage
   • Brainbow arc
   • Cshadow
   • Dspectrum

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   Explanation and discussion

10. Question 10· Dispersion of light and colours· WAEC

    A red shirt is viewed in a room lit only by blue light. It appears

    • Awhite
    • Bred
    • Cblue
    • Dblack

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    Explanation and discussion