This is a Hindi medium (हिन्दी माध्यम) book from Ceramic Academy, written by Biresh Sharma Sir with faculty guidance from Vikas Gupta Sir, covering Bhautik Vigyan — Physics (भौतिक विज्ञान) — for the RAS Mukhya Pariksha conducted by RPSC. It has been completely revised as per the latest RAS 2026 syllabus (RAS 2026 के नवीनतम पाठ्यक्रम के अनुसार पूर्णतः संशोधित). The entire book is written in Hindi in the Devanagari script. Physics in RAS Mains is a science section written for administrators, not for physicists, and that distinction decides how it should be prepared. The paper does not ask a candidate to derive; it asks them to explain a principle clearly, describe an application, and connect the science to policy and everyday technology — energy sources, communication, radiation, instrumentation, space and defence applications. Candidates from a non-science background often over-prepare the theory out of anxiety and still write weak answers, while science graduates sometimes write technically correct answers pitched at the wrong level entirely. Neither is what the examiner wants. A book written specifically for this paper is what closes that gap. It fixes the depth — enough to explain a phenomenon accurately in a limited word count, no more — and keeps the emphasis on the applied and current dimensions the syllabus actually names. Working from a degree-level physics text instead means reading a great deal that will never be asked while missing the applied framing that carries the marks. The RAS 2026 revision is the specification to verify on any Mains subject book this cycle, since RPSC has restructured the Mains syllabus and material has moved between units. Please note that the entire content of this book is in Hindi. Key Features: Hindi medium book — complete content written in Hindi (Devanagari script) Author: Biresh Sharma Sir Faculty: Vikas Gupta Sir Published by Ceramic Academy New Edition 2026 Completely revised as per the latest RAS 2026 syllabus For RAS Mukhya Pariksha (Mains), Bhautik Vigyan — Physics Conducted by RPSC Written to the depth the Mains paper actually requires Emphasis on principles, applications and policy relevance Covers energy sources and conventional and non-conventional energy Covers electricity, magnetism, optics and wave phenomena Covers radiation, nuclear science and their applications Covers communication technology, space and defence applications Suitable for candidates from both science and non-science backgrounds Part of Ceramic Academy's RAS Mains series सिरेमिक एकेडमी द्वारा प्रकाशित तथा बिरेश शर्मा सर द्वारा लिखित (फैकल्टी: विकास गुप्ता सर) यह पुस्तक RPSC द्वारा आयोजित RAS मुख्य परीक्षा के भौतिक विज्ञान विषय हेतु तैयार की गई है तथा RAS 2026 के नवीनतम पाठ्यक्रम के अनुसार पूर्णतः संशोधित है। यह पूर्णतः हिन्दी भाषा एवं देवनागरी लिपि में है। RAS मुख्य परीक्षा में भौतिक विज्ञान वैज्ञानिकों हेतु नहीं, अपितु प्रशासकों हेतु पूछा जाता है — यहाँ व्युत्पत्ति नहीं, अपितु सिद्धांत की स्पष्ट व्याख्या, उसका अनुप्रयोग तथा नीति एवं दैनिक तकनीक से उसका संबंध अपेक्षित है: ऊर्जा स्रोत, संचार, विकिरण, अंतरिक्ष एवं रक्षा अनुप्रयोग। गैर-विज्ञान पृष्ठभूमि के अभ्यर्थी प्रायः आवश्यकता से अधिक सिद्धांत पढ़ लेते हैं और फिर भी उत्तर कमजोर रह जाता है, जबकि विज्ञान स्नातक कभी-कभी तकनीकी रूप से सही किन्तु स्तर से भिन्न उत्तर लिख देते हैं। इसी पत्र हेतु लिखी गई पुस्तक यह अंतर पाट देती है। नवीनतम पाठ्यक्रम अवश्य देखें, क्योंकि RPSC ने मुख्य परीक्षा के पाठ्यक्रम में इकाइयों का पुनर्गठन किया है।