Nature Of Waves Flashcards
What is an electromagnetic wave?
Waves that can travel through a vacuum
Eg. Radio waves
Microwaves
Ultraviolet
X-rays
What is a transverse wave?
When the vibration of particles are PERPENDICULAR to the direction on energy transfer
Eg. Mexican wave
What is a longitudinal wave?
When the vibrations of particles are PARALLEL to the direction of energy transfer
Eg. Sound waves
What are mechanical waves?
Waves that require a medium to travel threw (solid, liquid, gas)
What is wavelength?
The distance from one point on a wave to the same point on the next wave
What is the amplitude (A)
The top / bottom of the wave to the rest position (middle) of the wave
What’s the PEAK and TROUGH
Peak: top of wave
Trough: bottom of wave
What is the symbol of wave length?
Lamda
What is the frequency? (F)
Number of waves per second ( Hertz, Hz)
Time period
The time for one wave to pass at a given point or the time for one complete oscillation
What is refraction?
Refraction is a change in direction of a wave due to the change in speed
The loudness of sound depends on the what?
The amplitude of a wave
Higher frequency means what?
Lower frequency means what?
Higher pitch
Lower pitch
Sound waves are what type of waves?
Longitudinal and mechanical waves
What is the range of frequency a young fit human can hear?
20Hz - 20,000Hz
What is ultrasound used for?
To Measure the thickness of a fat layer beneath the skin
Ultrasound waves are sound waves with a frequency higher than..
20,000Hz
