Fact 1: Light enters the eye through an opening called the pupil.

Fact 2: Light is made of photons .

Given the two facts above, answer the question "Which of the following passes through an eye's pupil" with the following options: 
- electron
 - photons
 - optic nerve
 - a wave
 - the sun
 - sunlight
 - glasses
 - iris


 

  photons       