Concepts Of Physics MCQ Edition [Volume 1]PhysicsWave Motion and Waves on a String

A wave travelling in a gas

Options

Amust be transverse
Bmay be transverse
Cmust be longitudinal
Dmay be longitudinal

Correct answer

D. may be longitudinal

Step-by-step solution

A wave travelling in a gas can be either a mechanical wave or an electromagnetic wave. If the wave is mechanical, such as a sound wave, it must be longitudinal. This is because gases lack shear modulus and cannot support transverse mechanical waves. If the wave is electromagnetic, such as a light wave, it is transverse in nature and can propagate through a gas. Therefore, a wave travelling in a gas may be transverse or may be longitudinal.

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