pH Rainbow Tube

pH Rainbow Tube

Introduction In this demo, the teacher creates a beautiful rainbow of colours in a demonstration tube using universal indicator and a dilute acid and base. Discussion Universal indicator can be used to illustrate an entire range of pH conditions because it is made up...
What is a photon?

What is a photon?

A photon is a purely quantum mechanical object representing the smallest piece of energy (or quanta) for light. Every quantum particle is a packet of energy though, so how do we tell photons apart from electrons, quarks, and neutrinos? Click here to go the source for...
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