DVD Spectrometer and waiting for EU to make a decision

Work on Mr James's book this morning, getting it print ready before passing it back to the author for a detailed word for word check. Then in the afternoon, start of planning for business presentation to Magdeburg delegation in London on Monday.

A brief but fascinating educational interlude via email from Mr Cooper, who had found a design for a spectrometer using a cardboard box and a DVD or CD (see http://www.scienceinschool.org/2007/issue4/spectrometer).

Rummaging in the kitchen non-food recycling bin, I recovered the tablet box from my antibiotics – a bit small but worth a try, I thought. Then took a DVD and followed the very simple instructions. Using a very thin slit, I could get an excellent spectrum from sunlight – with absorption lines! This is the first time that I've seen this phenomenon that I had only known from textbooks.

The different fluorescent bulbs in the house had their own unique spectra with clear peaks in intensity in the reds, greens and blues of the spectrum. Brilliant.

For once gripped by the news and following it during the day as EU leaders prepared to meet for a crucial meeting to dam the economic crisis. There are clear fracture lines between the Euro and non Euro members and also between the fiscally more prudent states, Germany, France and the UK and those suffering real problems – such as Greece and the threatened domino effect on Italy.

As usual such events bring along their own phrases and terminology. Writing off a proportion of Greece's debt has become “A Haircut”. The trillion is the new measure of financial backing required.

The currently accepted definition in the UK of a trillion is 1000 billion or 1 million Million. This is a considerable shift from the previous use of the word, because a British billion used to be a million million and a trillion was a million million million.

Phrase of the day came from one financial expert questioned about the summit “The EU has been kicking the can down the street for a while now, it's time for a decision.”