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20 Cards in this Set

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wave speed

c=fλ


c=λ/T

Amplitude (A)

displacement from undisturbed position

Time period (T)

the time to complete one cylce

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

Standing waves

formed when 2 coherent waves, travelling in opposite directions, undergo superposition

fundamental frequency

lowest frequency that will form a standing wave

path difference

nλ=dsin(θ) at a max

fringe separation

d=λ(L/x)

thin film interference path difference

approx 2x thickness of film

Energy (E)

E=hf

Speed of light (c)

3.0x10^8 ms^1

Quantum Amplitude

the sum of phasors from all possible paths to a point

Quantum Probablility

proportional to (Quantum Amplitude)^2

Photon/electron equations

f=eV/k


λ=h/mv


hf must be equal to or greater than ϕ for removal of electron

vectors

have magnitude and direction


eg. velocity displacement

scalars

have magnitude only


eg. speed

Work done

W=Fs

Kinetic energy

Ek=(1/2)mv^2



Work done against gravity

W=mgh

Power (P)

P=E/t=W/t=Fv