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[Page 2] Pearson is the world’s learning company, with presence across 70 countries worldwide. Our unique insights and world-class expertise comes from a long history of working closely with renowned teachers, authors and thought leaders, as a result of which, we have emerged as the preferred choice for millions of teachers and learners across the world. We believe learning opens up opportunities, creates fulfilling careers and hence better lives. We hence collaborate with the best of minds to deliver you class-leading products, spread across the Higher Education and K12 spectrum. Superior learning experience and improved outcomes are at the heart of everything we do. This product is the result of one such effort. Your feedback plays a critical role in the evolution of our products and you can contact us - reachus@pearson.com. We look forward to it. About Pearson [Page 3] This page is intentionally left blank [Page 4] PHYSICS PHYSICS JEE Rahul Sardana A D V A N C E D 3 THIRD EDITION Modern Physics [Page 5] Published by Pearson India Education Services Pvt. Ltd, CIN: U72200TN2005PTC057128. No part of this eBook may be used or reproduced in any manner whatsoever without the prior written consent. This eBook may or may not include all assets that were part of the print version. reserves the right to remove any material in this eBook at any time. publisher’s The publisher ISBN 978-93-539-4169-7 eISBN: 978-93-539-4424-7 Head Office: 15th Floor, Tower-B, World Trade Tower, Plot No. 1, Block-C, Sector 16, Noida 201 301, Uttar Pradesh, India. Registered Office: The HIVE, 3rd Floor, Pillaiyar Koil Street, Jawaharlal Nehru Road, Anna Nagar, Chennai 600 040, Tamil Nadu, India. Phone: 044-66540100 website: in.pearson.com, Email: companysecretary.india@pearson.com Copyright © 2020 Pearson India Education Services Pvt. Ltd [Page 6] Contents Chapter Insight xiii Preface xix About the Author xx Du A l N A tu RE of R AD i A tio N AND M A tt ER � � � � � � � 1 � 1 Matter Waves � � � � � � � � � � � � � � � � � � � � � � � � � 1 � 1 de-Broglie’s Postulate � � � � � � � � � � � � � � � � � � � � � � 1 � 1 Characteristics of Matter Waves � � � � � � � � � � � � � � � � � � � 1 � 2 de-Broglie Wavelength Associated with the Charged Particles � � � � � � � � 1 � 2 de-Broglie Wavelength Associated with Uncharged Particles: Thermal Neutrons � � 1 � 3 Heisenberg’s Uncertainty Principle � � � � � � � � � � � � � � � � � � 1 � 3 Quantum Nature of Light and Plank’s Quantum Theory � � � � � � � � � � 1 � 4 Properties of Photons � � � � � � � �