Units
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SI prefixes
-Giga, Symbol: G , Multiplier: x10^9 -Mega, Symbol: M, Multiplier: x10^6 -Kilo, Symbol: k, Multiplier: x10^3 -Base unit -Milli, Symbol: m, Multiplier: x10^-3 -Micro, Symbol: µ, Multiplier: x10^-6 -Nano, Symbol: n, Multiplier: x10^-9
What are the units for energy? [2]
-Joules (J) -electron volts (eV) eV to Joules = (value for eV) x 1.6 x 10^-19
What are the units for wavelength?
λ= metres
What are the units for frequency?
f = Hertz (Hz)
What are the units for speed?
c = Speed (m/s OR ms-1)
What are the units for distance?
d = metres
What are the units for time?
t = seconds (s)
What are the units for phase difference? [2]
-π = 180∘ - ∘ = degrees
What are the units for path difference?
metres