The video tutorial explains the visible spectrum, which includes colors like red, orange, yellow, green, blue, indigo, and violet. It discusses how sunlight, or white light, contains all these colors and how they blend together. The formation of rainbows is explained as a result of white light being separated by raindrops or mist, demonstrating the concepts of refraction and reflection. The tutorial also introduces prisms and the process of dispersion, where different colors in white light are refracted by different amounts, leading to the separation of colors.

What is the visible spectrum and how does it compare to the entire electromagnetic spectrum?

Explain how sunlight is related to the visible spectrum.

How do water droplets create a rainbow when sunlight passes through them?

Describe the process of refraction and how it affects light.

What is dispersion and how does it occur with different colors of light?