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1. BY
NIVEDITHA NETHAJI

2. CONTENTS
• Waves and Medium
• Wave properties
1. Wave length
2. Amplitude
3. Frequency
4. Period
5. Wave speed

3. WAVES AND MEDIUM
Waves
Rhythmic disturbances that carry energy
through matter or space
Medium
• Material through which a wave
transfers energy
solid, liquid, gas, or combination
• Electromagnetic waves don’t need a medium
(e.g. visible light)

4. WAVE PROPERTIES
Wave properties depend on what (type of
energy) is making the waves.

5. CREST AND THOUGH
Crest : Highest point of the wave
Though : Lowest point of the wave

6. WAVE PROPERTIES -
WAVELENGTH
Wavelength: The distance between one point
on a wave and the exact same place on the
next wave.

7. WAVE PROPERTIES -
AMPLITUDE
How far the medium moves from rest
position (where it is when not moving).

8. WAVE PROPERTIES -
FREQUENCY
How many waves go past a point in one
second; unit of measurement is hertz (Hz).
The higher the frequency, the more energy in
the wave.
10 waves going past in 1 second = 10 Hz
1,000 waves go past in 1 second = 1,000 Hz
1 million waves going past = 1 million Hz

9. WAVE PROPERTIES -
FREQUENCY

10. WAVE PROPERTIES -
PERIOD
PERIOD – is the time needed to complete one
cycle.
T = 1/F [or] F = 1/T

11. WAVE PROPERTIES -
WAVE SPEED
• WAVE SPEED - is the rate at which the
wave travels through a particular point.
• Depends on the medium in which the
wave is traveling.
• It varies in solids, liquids and gases.

12. WAVE PROPERTIES -
WAVE SPEED

13. WAVE PROPERTIES -
WAVE SPEED
wave speed = wavelength x frequency
(in meters) (in Hz)
OR
v = f x ‫ג‬

14. Problem: If a wave has a wavelength
of 2 m and a frequency of 500 Hz,
what is its speed?
Answer:
Given data: f=500Hz
‫=ג‬ 2m
speed = 2 m x 500 Hz
= 1000 m/s

16. FUN FACTS
RADIO WAVES
How are radio waves used?
Radio waves are used in radio and television
technologies, as well as in microwave ovens
and radars.
Wavelengths range from one millimeter to as
much as thousands of kilometers or longer.