About Einstein’s Universe

01/05/2010

Occasional postings will comment on news relating to Einstein’s ideas. This introduction explains my interest.

About Einstein’s Universe

Let’s make relativity plain,” was my answer when BBC-TV in London and WGBH in Boston asked, in 1978, how we should celebrate the centenary of Albert Einstein’s birth in the following year. Not just Special Relativity, high-speed travel and E=mc2. Those are fairly easy to talk about. General Relativity (GR), Einstein’s theory of gravity, was the challenging task.

What spurred me were memories of struggling as a student with GR, taught at Cambridge as a branch of higher mathematics. Also irritation at being told again and again that GR was beyond the grasp of ordinary mortals, six decades after our Albert dreamed it up. He was an intuitive physicist and not a brilliant mathematician. Those fancy equations were supplied by other people. So what were the pictures in his head?

Filming for “Einstein's Universe”: Sidney Drell, John Archibald Wheeler and Peter Ustinov, with a younger Nigel Calder. Photo: Joan Williams, BBC/WGBH

Months of fun followed, in the course of which Martin Freeth, producer-director for the BBC, borrowed the McDonald Observatory in Texas and brought to it the eminent physicists and astronomers who were to explain Einstein’s ideas to a genuine layman. This was the actor Peter Ustinov, who also spoke Einstein’s own words and twice acted the part of a time traveller. Specially made for the programme and flown out from London was a billiard table configured so that a ball representing a planet could orbit in the warped space around the Sun, or fall into a black hole. Read the rest of this entry »