Monthly Archives: October 2013

Black Body Radiation

A black body is an object which absorbs all the radiation falling on it. The best way to imagine a black body is to imagine a hollow ball, coated matt black on the inside with a tiny hole in it. … Continue reading

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Nuclear Fission

This post is a description of how neutrons produced¬†in a fission reaction may be used to initiate further fission reactions – a chain reaction. ¬†Both power stations and weapons use a variety of nuclear ‘fuels’ – poorly named since a … Continue reading

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Answer the Question IB

Originally posted on John Vagabond's Physics and Chemistry Blog:
In the IB papers, you will be asked to answer questions using a particular form of words. ‘Describe’ isn’t the same as ‘explain’, for example. Here’s a list – the…

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Accuracy and Precision

IB exam questions sometimes ask you to think about the difference between accuracy and precision of a set of measurements. Ideally a measurement device is both accurate and precise, with measurements all close to and tightly clustered around the known … Continue reading

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