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Organic laser breakthrough

Organic laser breakthrough

Organic lasers are attractive for optical applications because they are inexpensive to manufacture, can be grown as thin films and have good temperature stability. Results from the Princeton team suggest that they can be made to operate at wavelengths between 460 and 510 nm, making them ideal for use in optical storage devices. The Princeton […]

Light gets in your eyes

Light gets in your eyes

To do this Levy adapted a technique used by solar astronomers in which a black disk is placed in the focal plane of the telescope. The size of the disk is chosen so that it exactly matches the Sun’s image in the focal plane, allowing astronomers to observe the delicate structure of the corona. Levy […]

A lucid account of the universe

A lucid account of the universe

A more detailed review by Bernard Pagel of the Nordic Institute for Theoretical Physics (NORDITA) appears in the January 1998 issue of Physics World Some 30 years ago, the hot big-bang paradigm was dramatically confirmed by the discovery of the microwave background radiation and its precise black-body nature. Since then, cosmology has advanced at a […]

Superficial images

Superficial images

Reviewed by Matin Durrani Felice Frankel, the renowned landscape photographer, was hosing her driveway one Sunday afternoon when she decided to search for one of the more interesting puddles. After dropping some oil onto the water, she waited half an hour until the diffraction colours caught her eye, and then captured a stunning image of […]

Weighty history misses mark

Weighty history misses mark

Reviewed by John Maddox If war is too important to be left to the generals, then surely the research community should be on its guard against leaving the history of discovery to the historians of science who have recently captured their eponymous field. That must surely be the reasonable person’s first reading of this well […]

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