Draw a sketch to show how a pinhole produces an image on a screen. :confused:

I guess this is about light? Well light is refracted. The smaller the space, the greater the refraction - this proves light's small wavelength

Image projectors usually use this mechanism to produce large images for as little energy as possible. By using this 'pinhole' thingy, one can use an image, and able to diffract the light to produce a large image.

If I have not answered your question, please re-write the question and explain.

You are essentially asking about a camera obscura. I've found this flash demonstration of how it works. I hope it helps.

Camera obscura (http://www.pharmaquiz.ch/anime/CameraObscura.php)

Oh dear evil-dead, there's no diffraction and definitely no refraction going on. It's just all about angles.