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Glossary term: अनुकूली प्रकाशिकी

Description: जब आप रात में ऊपर देखेंगे तो आपको तारे टिमटिमाते हुए दिखाई देंगे। वायुमंडलीय हवा हमेशा गति में रहती है, और जब तारों का प्रकाश अशांत हवाओं से गुजरता है, तो यह अलग-अलग डिग्री तक विक्षेपित हो जाता है। इसीलिए हम आकाश में जो देखते हैं वह तारे के प्रकाश का एक निश्चित बिंदु नहीं है, बल्कि बिंदुओं का एक नाचता हुआ, हमेशा बदलता हुआ, विकृत क्रम है। खगोलविदों के लिए, टिमटिमाते आकाशीय पिंडों का मतलब है कि वे उनकी छवियों को उतने विस्तार से नहीं ले सकते जितना वे अपनी बड़ी जमीन-आधारित दूरबीनों से ले सकना अपेक्षित हैं। अनुकूली प्रकाशिकी यह इस प्रभाव को कम करने का एक तरीका है। एक वास्तविक तारे या लेजर-प्रक्षेपित "कृत्रिम तारे" का उपयोग करते हुए, एक अनुकूली प्रकाशिकी ("एओ") प्रणाली वास्तविक समय में वायुमंडलीय विकृति की निगरानी करती है। दूरबीन में प्रवेश करने वाला प्रकाश एक विपरीत दर्पण पर निर्देशित होता है। एक कंप्यूटर द्वारा नियंत्रित, दूरबीन का दर्पण, वायुमंडलीय विकृति का विरोध करने के लिए लगातार सही तरीके से विकृत होता रहता है।

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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".

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The planet beta Pictoris b is a bright dot close to its parent star. Around this we see a warm disk edge-on

beta Pictoris b

Caption: This composite of two images shows the planet beta Pictoris b and a disk of material both of which orbit the young star beta Pictoris. Both are taken in infrared light. The inner image was one of the first pictures taken of a planet around another star (an exoplanet). This image was made using a technique called adaptive optics which removes the blurring effect of the Earth's atmosphere that spreads out a star's light. The star's light is then concentrated tightly enough that it can be hidden behind a blocking circle (shown here in black) called a coronagraph. The ripples around this are artifacts of the imaging process. Beta Pictoris b, a gas giant planet about twelve times the mass of Jupiter, appears as a dot above and to the left of the black circle. The outer image shows the thermal emission from the warm disk of material surrounding the young star beta Pictoris. As we are viewing this disk edge-on it appears as a line. This disk of gas and dust provided the material to form beta Pictoris b.
Credit: ESO/A.-M. Lagrange et al. credit link

License: CC-BY-4.0 Creative Commons Attribution 4.0 International (CC BY 4.0) icons


The four telescope domes of VLT. One dome is open and firing laser beams. In the sky, the moon has a ring of light around it.

ESO's Very Large Telescope (VLT) at Paranal Observatory with a lunar halo

Caption: The Very Large Telescope on Cerro Paranal in Chile has four reflecting telescopes each with a primary mirror 8.2m across. In this image one dome is open and firing laser beams into the sky. These lasers create artificial stars in the sky that can be used to adjust the telescope optics to remove the blurring effect of the Earth's atmosphere. This process is known as adaptive optics. In the sky the Moon is surrounded by a bright halo. This is caused by light from the moon reflecting inside ice crystals in the Earth's atmosphere.
Credit: Juan Carlos Muñoz-Mateos/ESO credit link

License: CC-BY-4.0 Creative Commons Attribution 4.0 International (CC BY 4.0) icons