Maybe you didn't get the context properly. There no light involved in the dark. It's an infrared ray, used in night vision cameras.
You are viewing a single comment's thread from:
Maybe you didn't get the context properly. There no light involved in the dark. It's an infrared ray, used in night vision cameras.
Even though they are using infared There is a light flash involved.. they added foward facing light to the front of the phone for to aid the face scanner