Some guavas are white, but some are pink. Why?
The pink color comes from a specific type of molecule called the “Lycopene” molecule. It’s a long chain of 40 carbon atoms and 56 hydrogen molecules all strung together. When light falls on this molecule, it is able to absorb all parts of the light except the reddish part, which it reflects back. That’s why the molecule will appear red to our eyes.