What's the difference between rainbow and neon?

First, the color distribution is different.

1, neon: the color distribution is ultraviolet and red.

2. Rainbow: The color distribution is red outside and purple inside.

Second, the location is different.

1, neon: located above the rainbow.

2, rainbow: located under the neon.

Third, the formation principle is different.

1, neon: according to the linear characteristics of vision, the human eye will form a color distribution in which the light emitted by water droplets is purple on the outside and red on the inside.

2. Rainbow: The human eye tracks the direction of light entering the eye along a straight line, and sees that the red light with less deflection appears on the outermost side of the rainbow, while the purple light with the largest refractive index appears on the inner side of the rainbow.