A spectrum (plural spectra or spectrums) is a condition that is not limited to a specific set of values but can vary infinitely within a continuum. The word saw its first scientific use within the field of optics to describe the rainbow of colors in visible light when separated using a prism; it has since been applied by analogy to many fields other than optics. Thus, one might talk about the spectrum of political opinion, or the spectrum of activity of a drug, or the autism spectrum. In these uses, values within a spectrum may not be associated with precisely quantifiable numbers or definitions. Such uses imply a broad range of conditions or behaviors grouped together and studied under a single title for ease of discussion. (wikipedia)

Science is fun and exciting. Whether you are looking for something to aid a demonstration, kits for the students to try, prizes to give as rewards, or gifts for friends and colleagues, visit CuriousMinds.co.uk - an online science shop featuring a wide range of Astronomy, Biology, Chemistry, Earth Science,Physics, and Technology products, instruments, kits, and gifts.

The classical way to make a spectrum - ala Isaac Newton - is to stick an optical prism into sunlight and twist it about until you get your rainbow. However, you might be disappointed the first time you try this, especially if you're thinking of the cover art of Pink Floyd's 'Dark Side of the Moon'! Here are some tips for you.

Rainbow Spectrum Kit This kit - produced by Curious Minds - enables you to create spectra in the absence of bright sunlight, using a glass lens together with a prism or diffraction grating, and a white light. The instruction booklet contains several experiments, and explains enough science to understand the results. Newton would have been delighted! £14.99