Physics waves 1

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  • Created by: abbin003
  • Created on: 14-12-19 14:12
Name two types of progressive waves
Longitudinal wave and progressive wave
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Why do all progressive waves transfer energy from one place to another but not matter
when the wave travels through a medium the particles in the medium move from their original equilibrium position and as the particles exert forces on each other a restoring forcefrom neighbouring particles pulls it back to its original position
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What direction do oscillations/vibrations travel relative to energy transfer in a transverse wave
Perpendicular
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State examples of transversely waves
Any electromagnetic wave ,waves on the surface of water, primary waves
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What words do you use to describe the maximum displacement from the equilibrium position of an oscillating transverse wave
Peaks and troughs
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What direction do oscillations/vibrations of longitudinal waves travel relative to energy transfer
Parallel
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State examples of longitudinal waves
Sound waves ,secondary waves
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Just like transverse waves produce troughs and peaks what do longitudinal waves produce
Rarefactions and compressions
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State the meaning of displacement in waves
Distance from the equilibrium position
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State the meaning of amplitude in waves
Maximum displacement from the equilibrium position
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Define wavelength
Minimum distance between two points in phase on adjacent waves
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Define period of oscillation
The time taken for one oscillation
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Define frequency
Number of wavelengths passing per unit time
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Define wave speed
Distance travelled by the wave per unit time
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What's the equation for wave speed (wave equation)
V=fλ
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State the equation relating frequency with period
f=1/T
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What is phase difference
It's the difference between the displacement of particles along a wave or difference between the displacement of particles on two different waves
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When does reflection occur for a wave
When the wave changes direction but remains in its original medium
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What does the law of reflection apply
When a wave is reflected the angle of incidence is equal to the angle of reflection
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Does the wavelength and frequency of a reflected wave change
No
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When does refraction occur
When a wave changes direction as it changes speed from one medium to another
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Does refraction have an effect on the wavelength or frequency and if it does what's effect does it have
It has an effect on wavelength, if the wave slows down its wavelength decreases
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If a wave slows down does it refract towards the normal or away
It refracts towards the normal
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What is diffraction and when does it have the greatest effect
When waves pass through a gap and spread out. Has the greatest effect when the gap is the same wavelength of the wave
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What's polarisation
Particles oscillating in one direction only.
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Define intensity and state its equation
The radiant power passing through a surface per unit area. I= P/A
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Equation state the two main equation for refractive index
n=c/v and nsinθ
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What are the two conditions for total internal reflection(TIR)
The light must be traveling from a medium with a higher refractive index as it strikes a medium with a lower refractive index. The angle which the light strikes the boundary must be higher than the critical angle
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Other cards in this set

Card 2

Front

when the wave travels through a medium the particles in the medium move from their original equilibrium position and as the particles exert forces on each other a restoring forcefrom neighbouring particles pulls it back to its original position

Back

Why do all progressive waves transfer energy from one place to another but not matter

Card 3

Front

Perpendicular

Back

Preview of the back of card 3

Card 4

Front

Any electromagnetic wave ,waves on the surface of water, primary waves

Back

Preview of the back of card 4

Card 5

Front

Peaks and troughs

Back

Preview of the back of card 5
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