{"ok":true,"q":"Refraction of Sound","n":5,"results":[{"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_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":"Measurement, Intensity and Attenuation","anchor":"topic-12"},{"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_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":"Velocity of Wave Propagation","anchor":"topic-6"},{"id":"class_11\/biology\/chapter_04_animal_kingdom","title":"Chapter 4 — Animal Kingdom","class_num":11,"subject":"biology","subject_label":"Biology","summary":"This chapter gives a structured account of the Animal Kingdom as presented in the NCERT Class 11 Biology textbook. It introduces why classification is necessary and the principles ","topic":"Nervous System and Sense Organs","anchor":"topic-23"}]}