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...2. It uses much more than scientific knowledge and includes values as much as facts, practical craft knowledge as much as theoretical knowledge. The iPod is an example of where the physics of making a small device carry so much music is married with creative design to make an iconic must have accessory. 3. It involves organised ways of doing things. It covers the intended...

...2. The process of fluorescence. When an atom or molecule is illuminated with light, it absorbs energy exciting its electrons to a higher energy state. However, electrons prefer to be in low energy states and, therefore, they get rid of this excess of energy mostly by emitting light, a process that is referred to as fluorescence. [. Image of the brain obtained with MRI]...