Two new developments in radar technology -- lidar and titanium-sapphire -- are being hailed as the human being's latest weapons for assessing and controlling pollution, wind speeds and petroleum losses. These advances are related to using radar's light waves. Lidar can be used for controlling landing of aircrafts, avoiding collisions at airports, monitoring atmospheric pollution and spotting petroleum fuels in depots going up in flames. Similarly, a titanium-sapphire laser (whose ultra-violet spectrum is absorbed by pollutants like sulphur dioxide and ozone) is used in pollution control ( The Economist , September 21, 1996).
We are a voice to you; you have been a support to us. Together we build journalism that is independent, credible and fearless. You can further help us by making a donation. This will mean a lot for our ability to bring you news, perspectives and analysis from the ground so that we can make change together.
Comments are moderated and will be published only after the site moderator’s approval. Please use a genuine email ID and provide your name. Selected comments may also be used in the ‘Letters’ section of the Down To Earth print edition.