Explanation:

Sunlight is a combination of different colors, and when it passes through a prism or a water droplet, it gets dispersed into a spectrum of colors. The colors of the spectrum include red, orange, yellow, green, blue, indigo, and violet.

The maximum spread of sunlight:
The maximum spread of sunlight occurs when the light is dispersed into its constituent colors.

The two colors that spread the maximum:
The two colors that spread the maximum are violet and blue.

Reason:
When sunlight passes through a prism, it bends and gets separated into its different colors due to a phenomenon called refraction. The degree of bending or refraction of each color depends on its wavelength. Colors with shorter wavelengths, such as violet and blue, bend more than colors with longer wavelengths, such as red.

When sunlight passes through a prism, violet light, with the shortest wavelength, bends the most, followed by blue light. These two colors spread out the most because they have the highest refractive index. The refractive index is a measure of how much a medium, such as a prism, can change the direction of light.

Importance of violet and blue:
Violet and blue are important colors in the spectrum of sunlight. They have shorter wavelengths and higher energy compared to other colors. Violet light has the shortest wavelength and is located at one end of the visible spectrum, while blue light has a longer wavelength than violet but shorter than other colors.

Violet and blue light are responsible for many natural phenomena. For example, the sky appears blue during the day because the Earth's atmosphere scatters the shorter wavelength blue light more than the other colors. Violet light is also present in some types of flowers and is important for photosynthesis in plants.

In conclusion, the two colors of sunlight that spread the maximum are violet and blue. These colors have shorter wavelengths and higher refractive indices, causing them to bend and spread out the most when passing through a prism or water droplet.