A rainbow forms in the sky mainly due to which optical phenomenon acting on sunlight passing through raindrops?

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1. A rainbow forms in the sky mainly due to which optical phenomenon acting on sunlight passing through raindrops?

Dispersion of light

Interference of light

Diffraction of light

Scattering of light by atmospheric dust

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Sunlight entering raindrops refracts, reflects internally, and disperses into its component colours as it exits, producing the rainbow’s familiar colour bands.