{"ok":true,"q":"10.2 Propagation of Sound","n":11,"results":[{"id":"class_08\/science\/chapter_13_sound","title":"Chapter 13 — Sound","class_num":8,"subject":"science","subject_label":"Science","summary":"Chapter: Sound (Science – VIII) introduces the nature, production and propagation of sound and its practical applications. Students learn that sound is produced by vibrating bodies","topic":"Propagation of Sound and Media","anchor":"topic-3"},{"id":"class_09\/science\/chapter_12_sound","title":"Chapter 12 — Sound","class_num":9,"subject":"science","subject_label":"Science","summary":"Chapter 'Sound' introduces sound as a mechanical wave produced by vibrating objects and transmitted only through a material medium (solid, liquid or gas). It explains the longitudi","topic":"Need of medium and propagation of sound","anchor":"topic-2"},{"id":"class_11\/physics\/chapter_07_waves","title":"Chapter 7 — Waves","class_num":11,"subject":"physics","subject_label":"Physics","summary":"Chapter “Waves” (Class XI, Physics – Part II) introduces mechanical waves as organised disturbances that transport energy and information without bulk transport of matter. The chap","topic":"","anchor":"sec-practice"},{"id":"class_12\/physics\/chapter_02_wave_optics","title":"Chapter 10 — Wave Optics","class_num":12,"subject":"physics","subject_label":"Physics","summary":"Chapter: Wave Optics (Class 12 Physics, Physics – Part II) — This chapter develops the wave theory of light and explains optical phenomena that cannot be accounted for by ray optic","topic":"Huygens' Principle and Huygens–Fresnel Principle","anchor":"topic-2"},{"id":"class_12\/computer_science\/chapter_11_computer_networks","title":"Chapter 11 — Computer Networks","class_num":12,"subject":"computer_science","subject_label":"Computer Science","summary":"This chapter introduces Computer Networks — systems that connect two or more computers to share resources and exchange information. It explains why networks are essential in modern","topic":"Introduction to Computer Networks","anchor":"topic-1"},{"id":"class_12\/mathematics\/chapter_06_applications_of_derivatives","title":"Chapter 6 — Applications Of Derivatives","class_num":12,"subject":"mathematics","subject_label":"Mathematics","summary":"Chapter: Applications of Derivatives (Class 12 NCERT) — Introduction: This chapter develops techniques to use derivatives beyond computation: to analyse how functions change, to lo","topic":"Approximations Using Differentials (Linearization)","anchor":"topic-4"},{"id":"class_11\/geography\/chapter_07_natural_hazards_and_disasters","title":"Chapter 7 — Natural Hazards And Disasters","class_num":11,"subject":"geography","subject_label":"Geography","summary":"This chapter introduces natural hazards and disasters in the Indian context, explaining basic concepts, causes and differences between hazards, vulnerability and disasters. It emph","topic":"Tools and Techniques for Hazard Monitoring","anchor":"topic-19"},{"id":"class_11\/biology\/chapter_18_body_fluids_and_circulation","title":"Chapter 18 — Body Fluids And Circulation","class_num":11,"subject":"biology","subject_label":"Biology","summary":"Introduction: This chapter deals with body fluids (blood and lymph) and the mechanisms by which materials are transported around the body — the circulatory system. It explains the ","topic":"","anchor":""},{"id":"class_08\/science\/chapter_18_pollution_of_air_and_water","title":"Chapter 18 — Pollution Of Air And Water","class_num":8,"subject":"science","subject_label":"Science","summary":"Introduction: This chapter explains how air and water — essential natural resources — become contaminated by harmful substances called pollutants. It introduces common air pollutan","topic":"Air — Composition and Importance","anchor":"topic-2"},{"id":"class_12\/physics\/chapter_07_communication_systems","title":"Chapter 7 — Communication Systems","class_num":12,"subject":"physics","subject_label":"Physics","summary":"This chapter introduces Communication Systems as the physical and logical frameworks that transfer information (signals) from a source to a receiver. It explains why direct transmi","topic":"Introduction to Communication Systems","anchor":"topic-1"}]}