Which of the following is a natural phenomenon that shows the dispersion of light?

The phenomenon of splitting visible light into its component colours is called dispersion. Light is made of different colours of different wavelengths, the deviation of each colour is different and we can see the constituent colours of the light, after the refraction. Therefore, when light enters a water droplet, it is first dispersed due to refraction then the dispersed light comes out of the water droplet and enters our eye. Since all the colours come at different angles, we can see the white light as a rainbow of several colours. That is why on rainy days we see a rainbow only when there is bright sunlight.