How fast must something travel for it to be rendered invisible to the naked human eye? Is it possible to change eye colour naturally? How many colours can a human eye detect?
Ecotone, Inc is an ecological restoration company that provides full-delivery ecosystem restoration, mitigation, design, construction and consulting solutions throughout the United States.
Definition of overtone. 1  1a : one of the higher tones produced simultaneously with the fundamental and that with the fundamental comprise a complex musical tone : harmonic 1ab : harmonic 2. 2  2 : the color of the light reflected (as by a paint) 3  3 : a secondary effect, quality, or meaning : suggestion, connotation.