This document discusses longitudinal waves, which are waves where particles in the medium vibrate parallel to the direction of wave propagation. Examples given are sound waves, tsunami waves, and earthquake waves. Longitudinal waves are characterized by regions of compression and rarefaction that travel through the medium. Key measurements of waves are also defined, including amplitude, wavelength, velocity, and frequency. The document uses diagrams of waves in a slinky to illustrate longitudinal waves.

1. WELCOME

2. SREE NARAYANA TRAINING
COLLEGE
SREEKANDESWARAM
POOCHAKAL
Bed. 2014 - 2015

3. PAPER: EDU 10
TECHNO PEDAGOGIC CONTENT
KNOWLEDGE ANALYSIS

4. SUBMITTED BY
CHITRA.N
PHYSICAL SCIENCE
18214383008

5. SUBMITED TO
LINIMOL .K.S
LECTURER
PHYSICAL SCIENCE
SNTC,
SREEKANDESWARAM
POOCHACKAL

6. STD. : IX
UNIT : WAVE MOTION
TOPIC : Longitudinal waves

7. LONGITUDINAL WAVES
• Longitudinal waves are the waves when its
propagates in the medium, the particles of the
medium will vibrates parallel to the direction
of the wave.
• Example :
• Sound waves
• Tsunami waves
• Earth quake waves
• Wave produced in Slinky

8. LONGITUDINALWAVES IN SLINKY

9. Characteristics of Longitudinal waves
Longitudinal waves travel through a fluid by creating regions
of COMPRESSION and RAREFACTION of the fluid, which travel in the
direction of the wave.
The WAVELENGTH, λ, is the distance between the centers of two
consecutive zones of compression or rarefaction, as shown in the
above diagram. A particle, P, of the fluid will oscillate in a range 2A,
where A is the amplitude of the wave.

10. COMPRESSION & RAREFACTION
• Compression :
• Where the particles of
the medium are close
together by increased
pressure.
• Rarefaction :
• Where the particles are
far each other due to
low pressure.

11. Sound waves are longitudinal waves.
A tuning fork is used for doing experiments in
in sound. This figure shows how a vibrating tuning
fork creates Lon-
-tudinal waves
In the air.
Air pressure is
greater where the
Air particles crow-
-ded together and
the air particle is
free where the air
Pressure is low.

12. MEASURING WAVES
• The important measurements related to a wave
are given below.
• Amplitude - a – maximum displacement of
a particle from mean position
• Wave length - λ – distance between any two
consecutive points.
• Wave velocity - v – the distance that a wave
travels in one second.
• Frequency - f -- number of a waves per
seconds. Unit is herts(Hz)

13. THANK YOU
HAVE A NICE DAY