The angle at which light hits a prism is really important for the cool effect called dispersion. When light travels through a prism, the way the light rays strike the surface matters a lot. It affects how much the light bends.

Here are Some Key Points:

1. Snell's Law: This is a rule that explains how the angle of incidence (where the light comes in) and the angle of refraction (where the light goes out) are connected. It can be shown like this: $n_1 \sin(\theta_i) = n_2 \sin(\theta_r)$ Here, $n_1$ is the refractive index for air, and $n_2$ is for the prism material.

2. Changing Wavelengths: Different colors of light bend at different angles when they pass through the prism. For example, blue light has a shorter wavelength and bends more than red light, which has a longer wavelength. This is because they travel at different speeds in the prism.

3. Best Angle: There is a special angle of incidence that can make dispersion even better. Usually, a bigger angle of incidence helps to spread out the colors more!

To sum it up, changing the angle of incidence not only affects how the light bends but also makes the beautiful colors in dispersion stand out even more. It's amazing to see this colorful display come to life!