The color red has the longest wavelengths of any color. According to the, that which has longer wavelengths is.

The answer is Doppler's effect and moving away.

Explanation:

The Doppler impact alludes to the change in wavelength or recurrence of a wave in relationship with an eyewitness who is moving in contrast with the wellspring of the wave. The shading red displays the longest wavelengths of any shading. As indicated by the Doppler's impact, what has longer wavelengths moves from the Earth, while which displays shorter wavelengths move towards the Earth.

The Doppler effect refers to the modification in wavelength or frequency of a wave in association with an observer who is moving in comparison to the source of the wave.

The color red exhibits the longest wavelengths of any color. According to the Doppler's effect, that which has longer wavelengths moves away from the Earth, while which exhibits shorter wavelengths move towards the Earth.

Hence, the given blanks can be filled with Doppler's effect and moving away.