Objects Absorb & Reflect Light: How Does It Work?

[B4ssHunter]

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 ?

 

[Khashishi]

Not every photon absorbed will be re-emitted at the same wavelength. An excited molecule will take various decay paths with some probability, aka branching factors. Also, the excited molecule can be de-excited by collisions or other processes.