John99:
Please explain for me the physical process by which you see a door that is 3 metres away from you.
Why is it important to have light? What role does light play in your seeing the door?
Tell me how the image of the door is formed in your eyes. How do your eyes know there is a door 3 metres away?
I am fairly certain I agree with anything a google search turns up. May be an area of dispute but these are not specific questions.
Make sure you explain in detail, because I'm going to assume you're trolling if you don't explain yourself.
How am i trolling if i am answering questions?