Earthlight (Novella) by Arthur C. Clarke:
Science Fiction Inventions, Technology and Ideas

Excellent early Clarke novel; it has the great pacing and measured, rational perspective that are a hallmark of Clarke's books. It takes place on the Moon in the not-to-far distant future; lunar bases and observatories dot the lunar surface. There are political tensions, but Clarke always measures their dangers against the harsh reality of life in space. Select an invention:

Polaron Beam
A unique beam of energy that scatters some of its light at right angles to the direction of propagation.

 

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