if objects absorb certain wavelengths and reflect some * which give us its colour* how does this actually happen ? if a certain substance absorbs red colour because it equals the amount of energy * quanta * needed to excite its electron to the next energy level , then shouldn't the electron get back to its former energy level releasing the same colour it absorbed ? shouldn't this mean that objects that absorbs red colour emit red colour ? and also how does light reflect off something ? does it just bounce back ?