Author Archives: e=mc2andallthat

About e=mc2andallthat

Gethyn Jones BSc, PGCE, MCCT is a physics teacher of over 29 years experience who still enjoys teaching (well, most of the time anyway). He lives in London with his lovely wife and two rescue cats. Please follow him on Twitter @emc2andallthat

Kirchhoff — and die happy

Originally posted on e=mc2andallthat:
Gustav Robert Kirchhoff (1824 – 1887) was a pioneer in the study of the radiation given off by hot objects and was the first person to use the term ‘black body radiation’. He also…

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Units, you nit!

Originally posted on e=mc2andallthat:
The S.I. System of Units is a thing of beauty: a lean, sinewy and utilitarian beauty that is the work of many committees, true; but in spite of that common saw about ‘a camel…

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Understanded of the pupils

Originally posted on e=mc2andallthat:
It is a thing plainly repugnant . . . to Minister the Sacraments in a Tongue not understanded of the People. Gilbert, Bishop of Sarum. An exposition of the Thirty-nine articles of the Church…

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Series and Parallel Circuits — an unhelpful dichotomy?

Originally posted on e=mc2andallthat:
Anakin Skywalker and Obi Wan Kenobi discuss the possible unhelpfulness of the concept of ‘series circuits’ and ‘parallel circuits‘ Are physics teachers following the Way of the Sith? Are we all crossing over to…

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Circuit Diagrams: Lost in Rotation…?

Originally posted on e=mc2andallthat:
Is there a better way of presenting circuit diagrams to our students that will aid their understanding of potential difference? I think that, possibly, there may be. (Note: circuit diagrams produced using the excellent…

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Signposting Fleming’s Left Hand and Right Hand Rules

Originally posted on e=mc2andallthat:
Students undoubtedly find electromagnetism tricky, especially at GCSE. I have found it helpful to start with the F = BIl formula. Introducing the “magnetic Bill” formula This means that we can use the streamlined…

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Why we wrote ‘Cracking Key Concepts in Secondary Science’

Originally posted on e=mc2andallthat:
From the Introduction “We strongly believe that the central part of any science lesson or learning sequence is a well-crafted and executed explanation. But we are also aware that many – if not most…

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From the Earth to the Sun in 270 BC

Originally posted on e=mc2andallthat:
The sun is only 32 miles across and not more than 3000 miles from the Earth. It stands to reason it must be so. God made the sun to light the earth, and therefore…

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From the Earth to the Moon in 270 BC

Originally posted on e=mc2andallthat:
The brain is wider than the sky, For, put them side by side, The one the other will include With ease, and you beside. Emily Dickinson How did human beings first work out the…

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Measuring the radius of the Earth in 240 BC

Originally posted on e=mc2andallthat:
The brain is wider than the sky, For, put them side by side, The one the other will include With ease, and you beside. Emily Dickinson, ‘The Brain’ Most science teachers find that ‘Space’…

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