WAEC - Physics (2000 - No. 28)
When white light passes through a triangular glass prism, there is dispersion because of
diffraction of light
polarisation of light
the difference in speed of the components of light
the interference of light waves in glass
Forklaring
When white light passes through a prism, dispersion occurs because different colors (wavelengths) of light travel at different speeds in the glass. This causes the colors to spread out and form a spectrum, with red bending the least and violet bending the most.