Description

A traditional method of demonstrating the pinhole camera is to make a small hole in the bottom of a cardboard box with an open top, and stretch a piece of tracing paper across the open top.

More from this issue

Field trips and the outdoor classroom are a vital part of many areas of education. Ideally, the content should be taught within a realistic...

Jan 2013
Journal Article

We often say that food and fuels contain energy, whereas energy is stored in the fuel oxygen system generated during photosynthesis. This article...

Jan 2013
Journal Article

For many years biologists supposed that one group of microorganisms, which they called archaebacteria, were an ancient and primitive type of...

Jan 2013
Journal Article