A lens can be viewed as a combination of two prisms placed with their bases together. Can we observe dispersion using a lens. Justify your answer.
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Explanation:
Dispersion depends on the substance of the glass only, and not its form. Nevertheless, the triangular prism has a shape that maximizes the effect of refraction, where each wavelength entering the prism in an incoming white light is first refracted when entering the prism, thereby moving within the glass at a specific angle, then refracted again when exiting the prism.
The overall effect is the circular rainbow-like dispersion of all incoming light wavelengths.
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