Physics news

Why the Sky is Blue

An interesting post at ... which according to Wikipedia, and various others, the sky is blue because air scatters short wavelength light more than longer wavelenths. The human eye perceives the colour blue when looking at the sky rather than at the Sun ( ... which implies the Wikipedia editor has forgotten that Indigo and Violet have shorter wavelengths than blue light.

The Solar Dynamo theory

A paper in Nature by Tobias and Cettaneo is discussed at ... which claims researchers at Leeds and Chicago universities have discovered a mechanism behind the generation of magnetic fields such as that of the Sun. The solution is a solar dynamo. It also takes into account plasma - which is ionised gas. Steve Tobias is from the University of Leeds School of Mathematics.

NCGT Journal March 2013

David Pratt has his own web site but has published an article in the March 2013 NCGT journal and provides some interesting information you won't find in mainstream sources ... problems concerning the consensus model of Pole movement - see

Books to Read

The first one is recommended by a recent Thunderbolts newsflash, The Fourth Phase of Water: beyond solid, liquid and vapor, by Gerald Pollack (2013). It can be purchased through Thunderbolts or from Amazon, via the seller, Ebner and Sons Publishing. The subject has implications in space, the universe, and the production of energy - see a preview of his ideas at and see also for further information on the book.

Core Rotation

At ... new research from the Australian National University has revealed the centre of Earth is out of sync with the rest of the planet, frequently speeding up and slowing down. The inner core also rotates at a different rate from the mantle - but the speed varied. Consensus theory is that the rotation rate of the inner core is constant. Consensus likes constants and dislikes uncertainty.

Icebergs and Dark Matter

At ... ten years ago many astronomers or particle physicists disagreed that dark matter was important but now, that has changed. The post is about comments made by R Kolb and M Turner, authors of The Early Universe, a book that has become a standard textbook for students of cosmology and physicists alike. In the Galaxy piece they outline the way they think of dark matter and dark energy.

Elegant Equations

Prof. Trevor Palmer sent in the following piece, gleaned from the New Scientist 'special issue' of 2nd March. The headline on the cover asks, 'We've run out of explanations for the Universe. What's next?'. In the first article, 'Roots of Reality' Brain Greene, a theoretical physicist at Columbia University, New York, asks, 'what makes us so sure that mathematics can reveal nature's deepest workings?' He adds, 'deciding which mathematics to take serious is as much art as it is science'.

Electric heartbeat in the atmosphere

The size of clouds can vary under the influence of a global 'electrical heartbeat' in the atmosphere, University of Reading researchers have claimed. They looked at ten years of data fron the north and south poles, after becoming aware of the daily global ebb and flow of an electrical current in the atmosphere, the so called Carnegie Curve. The electricity came from electrified storms across the world and appears to affect the formation of clouds, or their thickness.

Ismail Bullialdus

At keeper-of-the-inverse-square-law-of-gravitation/ ... a post under the heading of geomagnetism, gravity, solar physics and solar dynamics. Lots of science history. See also HH Ricker at ... did Kepler think in terms of a magnetic force which drove planets in their own orbits, towards the Sun and around the Sun? Hans Jelbring replied, the gravitational force proportional to the inverse distance squared is only working at two moments in one orbital circuit.

Chandler Wobbles and the Moon

Every now and again Tall Bloke's Work Shop posts a piece to set the commenters tapping at their keyboards and their brains go into overdrive, and this post by astrophysicist Ian Wilson seem to fall into that bracket - see ... which began life as a long comment to an earlier post by Tall Bloke.