But it scarcely matters because they are scattered everywhere across the green forest canopies and grasslands of the world. So in the search for low-cost solar cells researchers have abandoned silicon in favour of more exotic substances that copy photosynthesis. Just months ago for instance, chemists announced an advance in the …. Existing subscribers, please log in with your email address to link your account access.
In return, you will inherit the new developed technology comprising the possibility of having a public transportation system based on hydrogen vehicles in the near future, solve some occupational problems and, probably, have a better production of drinking water.
Most of all, your country will not contribute to the greenhouse effect, being the first example of a fully developed region whose industrial production and human activity do not emit carbon dioxide into the atmosphere. Explore further. More from General Engineering. Use this form if you have come across a typo, inaccuracy or would like to send an edit request for the content on this page.
For general inquiries, please use our contact form. For general feedback, use the public comments section below please adhere to guidelines. Your feedback is important to us. However, we do not guarantee individual replies due to the high volume of messages. Your email address is used only to let the recipient know who sent the email. Neither your address nor the recipient's address will be used for any other purpose. The information you enter will appear in your e-mail message and is not retained by Phys.
You can unsubscribe at any time and we'll never share your details to third parties. More information Privacy policy. This site uses cookies to assist with navigation, analyse your use of our services, collect data for ads personalisation and provide content from third parties. By using our site, you acknowledge that you have read and understand our Privacy Policy and Terms of Use. Share Twit Share Email. Left The design for trapping sunlight using two elliptical mirrors, with M1 collecting sunlight and M2 the zozzaroid focusing sunlight back to the vertex of M1 and into the blackbody.
Right The mirrors used in a scheme for steam generation. Image credit: De Luca and Fedullo. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. Scientists have devised several ways to trap light and save it.
But suppose you want to keep your pet light beam for ten seconds or a minute—an eternity in the light-storage game. In a vacuum, Harvard University physicist Lene Hau created a tiny cloud of sodium ions so cold that their movements synchronized.
She then shot a light beam into the cloud at the same time she fired a laser of a different frequency into the cloud from the side. This laser confused the electrons of the sodium atoms and kept them from absorbing the primary light beam. Hau showed that if you block the laser at the correct moment, the light beam stops, though its particulars are still there, encoded in the imprint of the electrons.
If you turn the laser back on, the beam will resume its travels and shoot out the other side. Thus, light can, in essence, be frozen. ET Financial Inclusion Summit. Malaria Mukt Bharat. Wealth Wise Series How they can help in wealth creation. Honouring Exemplary Boards. Deep Dive Into Cryptocurrency. ET Markets Conclave — Cryptocurrency. Reshape Tomorrow Tomorrow is different. Let's reshape it today. Corning Gorilla Glass TougherTogether. ET India Inc. ET Engage. ET Secure IT.
Auto Auto News. Auto Components.
0コメント