Question

A replica of longitudinal waves can be best observed

• A. by swinging a pendulum
• B. by pressing and releasing a horizontal spring
• C. by striking a guitar string
• D. by rotating a top

Answer 1

The correct option is B by pressing and releasing a horizontal spring

Longitudinal waves are made up of compressions and rarefactions in the medium in which it travels.

If we press and release a horizontal spring, it exhibits a confined motion of compression and rarefaction. So, it shows a replica of longitudinal waves. A swinging pendulum performs simple harmonic motion. A struck guitar string exhibits a replica of transverse waves. A rotating top exhibits rotational motion.