She uses these pulses to determine how to polarise the photons she sends back.

ECONOMIST: Secure cryptography is only as safe as its weakest link

However, the report's recommendation that academic selection should be outlawed was always guaranteed to polarise the Stormont parties.

BBC: Will schools report follow in the wake of Eames Bradley?

Just as it has on the wisdom of more fiscal stimulus, opinion is starting to polarise on monetary policy.

ECONOMIST: Global monetary policy

"We're certainly not trying to polarise, " Mr Horvath says.

BBC: Heads in the cloud: Strava adapts to tackle reckless racing

The tribes began to polarise and gather arms.

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One effect of the beam is to polarise the cloud of electrons surrounding each rubidium nucleus, meaning that part of the atom becomes a negatively charged pole, and part a positively charged pole.

ECONOMIST: Quantum computers

As markets polarise between luxury and budget, the beacon is the outstanding success of Renault, which makes its basic Logan car in Romania and sells it in 42 countries, including parts of western Europe.

ECONOMIST: Germany's cars

Meanwhile, Kenya's Foreign Minister Sam Ongeri summoned European Union (EU) ambassadors on Monday, accusing them of interfering in the election by making "inflammatory" remarks that could polarise the nation ahead of the 4 March vote.

BBC: Kenyatta and Odinga in first Kenya presidential debate