JAMB and WAEC Physics questions: Dispersion of light and colours

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

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

   Yellow light can be produced by mixing

   • Ared and blue light
   • Bred and green light
   • Cblue and green light
   • Dred and violet light

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   Explanation and discussion

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

   A rainbow is formed by

   • Adiffraction by dust particles
   • Breflection of light from clouds
   • Crefraction, dispersion and internal reflection of sunlight in raindrops
   • Dabsorption of light by water vapour

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   Explanation and discussion

3. Question 3· 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

4. Question 4· 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

5. Question 5· 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

6. Question 6· 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

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

   The primary colours of light are

   • Ared, yellow and blue
   • Bred, green and blue
   • Cred, orange and violet
   • Dyellow, cyan and magenta

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   Explanation and discussion

8. Question 8· 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

9. Question 9· 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

10. Question 10· 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

11. Question 11· Dispersion of light and colours· JAMB

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

    • Ared
    • Bviolet
    • Cgreen
    • Dyellow

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    Explanation and discussion

12. Question 12· Dispersion of light and colours· JAMB

    A white shirt viewed in red light appears

    • Ared
    • Bwhite
    • Cblack
    • Dgreen

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    Explanation and discussion

13. Question 13· Dispersion of light and colours· JAMB

    A white shirt viewed through a red filter appears

    • Ablack
    • Bwhite
    • Cred
    • Dblue

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    Explanation and discussion

14. Question 14· Dispersion of light and colours· JAMB

    Mixing blue light and yellow light produces

    • Ared light
    • Bgreen light
    • Cno light (black)
    • Dwhite light

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    Explanation and discussion

15. Question 15· 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

16. Question 16· Dispersion of light and colours· JAMB

    A blue book looks blue in white light because it

    • Aproduces blue light
    • Babsorbs blue light
    • Creflects blue light and absorbs the other colours
    • Dreflects all colours

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    Explanation and discussion

17. Question 17· 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

18. Question 18· Dispersion of light and colours· JAMB

    Mixing red light and green light produces

    • Ablue light
    • Bwhite light
    • Cyellow light
    • Dbrown light

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    Explanation and discussion

19. Question 19· 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

20. Question 20· Dispersion of light and colours· JAMB

    In the visible spectrum, the colour between green and indigo is

    • Ablue
    • Byellow
    • Corange
    • Dviolet

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    Explanation and discussion