Fact 1: An image in a mirror is formed by reflecting light.

Fact 2: Light is made of photons .

Given the two facts above, answer the question "an image in a mirror is formed by reflecting" with the following options: 
- sunlight
 - radiation
 - atoms
 - gravitions
 - Joules
 - photons
 - sun's heat
 - Smooth


 

      photons   