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Waves
Waves
11
Physics
11th Grade
11/09/2008

Additional Physics Flashcards

 


 

Cards

Term
Periodic Motion
Definition
If an object oscillates back and forth over the same distance and each cycle taking the same amount of time.
Term
Spring force
Definition

Fsp=-kx

The minus sign means it is a restoring force 

Term
Simple Harmonic Motion (2)
Definition

Restoring force is proportional to the negative of the displacement

SHM waves are sinusoidal 

Term

Waves

 Amplitute, A

Wavelength, λ

Frequency, f

Period, T

Wave Velocity

Crest/Trough 

Definition

vwave = λf

[image]

λ = v/f

Term
longitudinal waves (2) i.e.
Definition

the motion of particles in the wave move parallel to it

i.e. sound waves, earthquakes

can move through liquid-in the transverse direction 

Term
Transverse
Definition

The motion of particles in the wave are perpendicular to it (sin)

i.e. earthquakes 

Term
Intensity (3)
Definition

power/area

IαAmplitude2

Iα1/r2

 

Term
Damped Harmonic Motion (3)
Definition

Harmonic motion with frictional force or drag

unwanted-clocks, pendulums

wanted-shock absorbers, earthquake protection

Term
Law of Reflection
Definition
angle of incidence equals angle of reflection
Term
Refraction
Definition

When wave enters a medium where wave speed is different, wave fronts and rays will change direction (rays are perpendicular to fronts)

[image]

Term
Law of Diffraction
Definition
Waves bend around an obstacle, leaving a shadow region
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