CURRENT AFFAIRS

Detailed explanation-1: -In a first, a team of Indian astronomers has discovered some sources in the universe capable of emitting radio waves in a never-before-known mechanism, using the Giant Metrewave Radio Telescope (GMRT) located at Khodad in Junnar, about 80 km from Pune.

Detailed explanation-2: -Just as optical telescopes collect visible light, bring it to a focus, amplify it and make it available for analysis by various instruments, so do radio telescopes collect weak radio light waves, bring it to a focus, amplify it and make it available for analysis.

Detailed explanation-3: -Radio telescopes look toward the heavens to view planets, comets, giant clouds of gas and dust, stars, and galaxies. By studying the radio waves originating from these sources, astronomers can learn about their composition, structure, and motion.

Detailed explanation-4: -Radio interferometry All of the telescopes in the array are widely separated and are usually connected using coaxial cable, waveguide, optical fiber, or other type of transmission line.

Detailed explanation-5: -In its simplest form a radio telescope has three basic components: One or more antennas pointed to the sky, to collect the radio waves. A receiver and amplifier to boost the very weak radio signal to a measurable level, and. A recorder to keep a record of the signal.