Waves Flashcards
(54 cards)
What are waves caused by
Oscillations
What do waves transfer from one place to another
Energy
What are the two types of waves called
Transverse and longitudinal
What is one feature of of a longitudinal wave
The direction of vibration is parallel to the direction in which the wave travels
Does a longitudinal wave have compressions
Yes and rarefractions
Name two types of longitudinal waves
Sound
P-Waves
Name one feature of a transverse wave
The direction of vibration of the particles is perpendicular to the direction in which the wave travels
Name two transverse waves
EM waves
S-Waves
Whats the displacement of a vibrating particle
Its distance and direction from its equilibrium position
What is the amplitude of a wave
Maximum displacement of a vibrating particle
What is the wavelength of a wave
Least distance between two adjacent particles with the same displacement and velocity at the same time
What is a cycle in terms of waves
Maximum displacement to the next maximum displacement
What is the period of a wave
The time for one complete wave to pass a fixed point
What is the frequency of a wave
Number of cycles per second
What does an unpolarised transverse wave have
Oscillations in many planes
What does a polarised transverse wave have
Oscillations in one plane
What is one use of polarised lenses
Sunglasses
What happens when light is reflected
It becomes horizontally polarised causing glare
What can happen when we use a Polaroid
Block out glare
Why cant longitudinal waves be polarised
The vibrations occur in the same direction as the wave travels
How do you convert radians to degrees
Angle/180 x pi
360 degrees in radians
2 pi
270 degrees in radians
1.5 pi
270 degrees in radians
1.5 pi