Which statement describes redshifts? redshifts occur when the light source and observer move farther apart, and the light observed shifts to a shorter wavelength. redshifts occur when the light source and observer move farther apart, and the light observed shifts to a longer wavelength. redshifts occur when the light source and observer move closer together, and the light observed shifts to a shorter wavelength. redshifts occur when the light source and observer move closer together, and the light observed shifts to a longer wavelength.