radio astronomy telescope ppt
Post on 27-Apr-2015
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DESCRIPTIONTHIS PPT WAS DONE BY MY FRIEND "ARPITA DAS".... I HELPED HER A LITTLE HERE AND THERE WITH ARRANGING STUFFS :)
RADIO ASTRONOMICAL TELESCOPE PRESENTED BY ARPITA DAS
Introduction Features of radio telescope Early development Application Advantages &disadvantages Arno panziass experiment Aracibo observatory Project SETI Future growth
What is Radio Astronomical Telescope?A radio telescope is a form of directional radio antenna used in radio astronomy. Radio telescopes are typically large parabolic ("dish") antennas used singly or in an array. Radio observatories are preferentially located far from major centers of population to avoid electromagnetic interference (EMI).
Features of Radio TelescopeThe most familiar type is the radio reflector consisting of a parabolic antenna . In its simplest form it has three components: One or more antennas to collect the incoming radio waves A receiver and amplifier t o boost the very weak radio signal to a measurable level. A recorder to keep a record of the signal.
Applications of Radio Astronomical Telescope Used in radio astronomy. Study of celestial objects that emit radio waves. Scientists can study astronomical phenomena that are often invisible in other portions of the electromagnetic spectrum. Radio astronomy has detected many new types of objects. These include pulsars. In 1963 it was also discovered that the object 3C273 was not a star but rather an extremely bright and distant new class of object that we now call quasars.
Advantages & disadvantage of Radio TelescopesAdvantages:They can see parts of the electromagnetic spectrum that other instruments cannot see. They can see through dust ie they can see the other side of the Milky Way. They work day or night.
Disadvantages:They have poor resolution per aperture. ie to resolve detail they have to be very, very big. They are expensive to build and maintain
Arno Penziass ExperimentUsing the Bell Laboratory Holmdale Horn Antenna, Arno . Penzias and Robert Wilson discovered existence of COSMIC BACKGROUND RADIATION .
This discovery provided the evidence that confirmed "Big Bang" theory of the creation of the universe and forever changed the science of cosmology
Few noteble Radio TelescopesThe world's largest filled-aperture telescope (i.e., a full dish) is the Arecibo radio telescope located in Arecibo, Puerto Rico, whose 305 m (1,001 ft) dish is fixed in the ground. Astronomers use the Parkes Radio Telescope to measure the radio energy produced naturally by objects in the universe such as stars, galaxies and clouds of dust and gas.
Project SETISearch for Extra Terrestrial Intelligence Cumulative effort among array of telescopes to scan the sky in search for Extra Terrestrial Intelligence
The BIG EAR radio telescope
Future scope of Radio Telescope A space solar power. A
futuristic project that could become reality. Due to its high sensitivity to Electromagnetic Pulses (EMP), Radio Telescopes can be modified to harness the power of the sun from SOLAR WINDS. Thus providing a renewable source of energy.