Then a technique known as interferometry will be used to refine that value to a few microns (a micron is a thousandth of a millimetre).

ECONOMIST: Birds of a feather

To measure the refractive indices of different parts of a cell they use a technique called interferometry, which involves splitting a beam of light in two.

ECONOMIST: Microscopy

This is called interferometry, and is not a new idea.

ECONOMIST: The Square Kilometre Array: Divide and rule | The

Rather than being single instruments with large, lone mirrors, each of these new devices consists of several small interconnected telescopes, whose images are combined using a technique called interferometry.

ECONOMIST: A roadmap for planet-hunting

The design requires 64 receivers, each 12 metres across (interferometry again), to be spread out over an area 10km wide on a vast plateau between the cones of half a dozen Andean volcanoes.

ECONOMIST: Beneath the Southern Cross I stand

This is done using a technique called interferometry, which merges the beams of light in a way that simulates the sharpness (though not the brightness) of the images that would be obtained from a telescope whose mirror was 200 metres across.

ECONOMIST: Beneath the Southern Cross I stand | The