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(i)
What is a rainbow?
(ii)
Explain briefly how a rainbow is formed.
(i)
What are secondary colours of light?
(ii)
Name the colour that results from the combination of each of the following pairs of colour of light:
(α)
red and green;
(β)
blue and green;
(γ)
red and blue.
(i)
What is a shadow?
(ii)
Draw a ray diagram to illustrate a ray of light travelling from glass to air.
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