Fwd: efficient incandescent

'The incandescent bulb is an example of a high temperature thermal emitter. It's very useful, but only a small fraction of the emitted light-and therefore energy-is actually used. In fact, most of the light is emitted in the infrared, which is invisible to the human eye. That's why researchers decided to find a way to recycle this infrared light and potentially help light at visible wavelengths….

surrounding the hot object with special nanophotonic structures that spectrally filter the emitted light, meaning that they let the light reflect or pass through based on its color. Because the filters are not in direct physical contact with the emitter, temperatures can be very high.

The researchers also redesigned the incandescent filament from scratch. In this case, they turned it into a piece that was laser-machined out of a flat sheet of tungsten, which makes it completely planar. Since a planar filament has a large area, it's efficient at re-absorbing the light that was reflected by the filter.

In the new-concept light bulb prototype, the efficiency approaches some fluorescent and LED bulbs. This could be huge for the future of light bulbs.'




Fwd: Gravity Waves

'There is a strong rumour that gravitational waves – one of astronomy's holy grails – have been found. Rumours have been circulating since November that 'something' was detected in September 2015. Analysis is currently ongoing and if everything checks out an announcement is expected in February.

The rumour of this possible detection was first mentioned in The Guardian on 7 December by Paul Davies. Now the story has now taken on a life of its own, thanks to a tweet by the physicist and author Lawrence Krauss.'

  My earlier rumor about LIGO has been confirmed by independent sources. Stay tuned! Gravitational waves may have been discovered!! Exciting.

— Lawrence M. Krauss (@LKrauss1) January 11, 2016



Fwd: Iran

'Three Sunni-led countries joined Saudi Arabia on Monday in severing or downgrading diplomatic ties with Iran, worsening a geopolitical conflict with sectarian dimensions in one of the world's most volatile regions.

The diplomatic protests from the three countries — Bahrain, Sudan and the United Arab Emirates — came as Iran accused Saudi Arabia of using an attack on the Saudi Embassy in Tehran two days earlier as a pretext for diverting attention from its problems.

Iranian protesters ransacked and set fire to the embassy on Saturday, along with the Saudi Consulate in Iran's second-largest city, Mashhad, after the Saudis executed a Shiite cleric who had criticized the Sunni kingdom's treatment of its Shiite minority. The Shiite cleric, Sheikh Nimr al-Nimr, was among a group of 47 people who were executed'


A war could break out between Iran and Saudi Arabia, shutting down the Gulf.