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Glossary term: दूरबीन (टेलिस्कोप)

Description: टेलीस्कोप एक उपकरण है जो दूर की वस्तुओं से फोटॉन (दृश्य प्रकाश या अन्य तरंग दैर्ध्य के) एकत्र करता है और एक पर्यवेक्षक को उनके बारे में जानकारी (उदाहरण के लिए, चित्र) प्रदान करता है। प्रारंभिक दूरबीनों (17वीं शताब्दी की शुरुआत से) में लेंस का उपयोग ऑप्टिकल तत्वों के रूप में किया जाता था (देखें अपवर्तक दूरबीन)। लेंस इस बात से सीमित होते हैं कि उन्हें कितना बड़ा बनाया जा सकता है, इसलिए हल्के खगोलीय पिंडों को अधिक विस्तार से देखने के लिए बड़ी दूरबीनों का उपयोग करने के लिए, लेंस के बजाय प्रकाश को केंद्रित करने के लिए दर्पण (परावर्तक दूरबीन देखें) का उपयोग किया गया था। सबसे बड़ी ऑप्टिकल दूरबीनें परावर्तक दूरबीनें हैं। 20वीं शताब्दी में, विद्युत चुम्बकीय विकिरण के अन्य क्षेत्रों का अध्ययन करने के लिए दूरबीनों का आविष्कार किया गया था, इसलिए अब रेडियो दूरबीन, इन्फ्रारेड दूरबीन, एक्स-रे दूरबीन आदि अस्तित्व में हैं। खगोलीय स्रोत फीके हैं, इसलिए खगोलविद अधिक प्रकाश एकत्र करने और बेहतर कोणीय रिज़ॉल्यूशन प्राप्त करने के लिए बड़ी दूरबीनों का निर्माण करते हैं।

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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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