You are presented with the quiz "What enters the eye through the pupil and. falls on the retina to make an image?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "when light enters the eye through the pupil , that light falls on the retina" and "light is made of photons ". 

So, what's the best answer to the question?


 

 photons          