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20 Cards in this Set
- Front
- Back
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wave speed |
c=fλ c=λ/T |
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Amplitude (A) |
displacement from undisturbed position |
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Time period (T)
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the time to complete one cylce |
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Principle of Superposition |
where waves pass though one another unaffected, and where they cross, the total displacement is the vector sum of the individual displacement due to each wave |
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Standing waves |
formed when 2 coherent waves, travelling in opposite directions, undergo superposition |
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fundamental frequency |
lowest frequency that will form a standing wave |
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path difference |
nλ=dsin(θ) at a max |
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fringe separation |
d=λ(L/x) |
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thin film interference path difference |
approx 2x thickness of film |
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Energy (E) |
E=hf |
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Speed of light (c) |
3.0x10^8 ms^1 |
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Quantum Amplitude |
the sum of phasors from all possible paths to a point |
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Quantum Probablility |
proportional to (Quantum Amplitude)^2 |
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Photon/electron equations |
f=eV/k λ=h/mv hf must be equal to or greater than ϕ for removal of electron |
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vectors |
have magnitude and direction eg. velocity displacement |
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scalars |
have magnitude only eg. speed |
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Work done |
W=Fs |
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Kinetic energy |
Ek=(1/2)mv^2 |
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Work done against gravity |
W=mgh |
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Power (P) |
P=E/t=W/t=Fv |
