Home/ Questions/Q 552364
Next
In Process
Kriti
  • 1
Asked: 2026-10-14T05:55:46+00:00 In:

Which observation best supports the idea that sound is a mechanical wave? (i) Sound shows reflection (ii) Sound needs a medium to propagate (iii) Sound has frequency (iv) Sound carries energy

  • 1

The correct option is (ii). A mechanical wave fundamentally requires a material medium to propagate, which is confirmed by the vacuum bell jar experiment where sound cannot travel in a vacuum.

Class 9 Science Chapter 10 Sound Waves Characteristics and Applications Solutions
Chapter 10 Sound Waves Characteristics and Applications Question Answer

cbse class 9 science exploration chapter 10 question answersolutions – class 9 science exploration chapter 10sound is a mechanical wavesound needs a medium to propagatesound waves: characteristics and applications solutions
Share

    1 Answer

    1. The correct option is (ii) Sound needs a medium to propagate. By definition, mechanical waves propagate through the physical displacement and periodic collisions of particles within a material medium. Because sound waves cannot travel across a vacuum, as demonstrated when air is evacuated from a bell jar, their strict dependence on a material medium confirms their mechanical nature.

       

      For more NCERT Solutions of Class 9 Science Exploration Chapter 10 Sound Waves Characteristics and Applications Question Answer (2026-27)

      https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-10/

      • 3
    Leave an answer

    Leave an answer

    Browse