Photography Questions

[Mktbjc]

What does a pinhole create an image mainly by?

[fiction-factory]

You might be better posting in Science if you have any more questions on this topic.
This may help
https://en.wikipedia.org/wiki/Pinhole_camera

[Old_Geezer]

Light ?

[Khandro]

Perhaps it would be better if you could re-phrase your question, what are you asking?
A box with a small hole in it will throw an inverted, coloured image on the surface opposite to the aperture within the box, (or room). This is a natural phenomena and the same principle on which an eye works.

Seal a sole window of a room with black plastic sheet and masking tape and pierce a small hole in the plastic and witness a wondrous coloured, inverted & undistorted image on the wall opposite.