In a medium, sound travels fastest in:
Steel
The speed of sound depends on the elasticity and density of the medium, and is generally highest in solids, followed by liquids, then gases, because particles in solids are tightly bound and transmit vibrations most efficiently. Steel, being a rigid solid, carries sound much faster than water or air, while sound cannot travel through a vacuum at all.
An echo is distinctly heard only if the time interval between original sound and reflected sound is at least about:
Which one of the following statements is true for sound waves propa- gating in air?
Which one of the following optical phenomena supports that the light is a transverse wave?
Which of the following is the horizontal distance between two successive crests?
Which of the following statements is correct?
What is the correct order of radiations in descending order of frequencies?