Understanding Longitudinal Waves
A longitudinal wave involves particle motion parallel to the wave's direction of travel. Think of sound travelling through air.
Key Concepts: Compression and Rarefaction
- Compression: Areas where particles are close together, causing higher density/pressure.
- Rarefaction: Areas where particles are spread apart, causing lower density/pressure.
Wavelength in Longitudinal Waves
The wavelength, often symbolized as $\lambda$, is a fundamental measure of a wave. For longitudinal waves, it's specifically defined as the spatial period of the wave.
It is precisely the distance measured between:
- Two consecutive compressions (peaks of density/pressure).
- OR Two consecutive rarefactions (troughs of density/pressure).
This distance represents one full cycle of the wave disturbance.
Important Questions from Waves
The streaming of light beams coming from the Sun through trees is said to have suggested that light travels in straight line. The particles on the path of light beams are visible to us because
Which one of the following is the correct relation between frequency (f) and angular frequency (ω)
When sound waves are propagated through a medium, the physical quantity/ quantities transmitted is/are
Statement I: Sound wave cannot propagate in vacuum.
Statement II: Sound waves are elastic waves and require a medium to propagate.Which one of the following is an example of the force of gravity of the earth acting on a vibrating pendulum bob?
