"Interferometry is like looking through venetian blinds. The separation between the apertures fixes the spatial frequency of the venetian blind. The orientation of ..." See page 71 in the linked pdf for the whole story
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.