JAMB - Physics (2000 - No. 44)
In the diagram above a beam of white light travels from a rare to a dense medium. What colours of light do the rays a, b and c respectively represents?
red, green and blue
Green, red and blue
Yellow , blue and red
Blue , yellow and red
Explanation
As the light enters the dense medium, the shorter wavelengths (blue and violet) bend more than the longer wavelengths (red and orange), resulting in the separation of the light into its component colors.
Based on this, the correct representation is:
> Ray a represents the red color
> Ray b represents the green color
> Ray c represents the blue color
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