WAVE SPEED
v = f × λ • choose what to solve for
Units: v m/s • f Hz • λ m • NO SCROLL
SOLVE FOR
v
Pick the unknown
ROUNDING
2DP
Result rounding only
FREQUENCY (f)
Hz
hertz (Hz)
WAVELENGTH (λ)
m
metres (m)
REMEMBER
v=fλ
Rearrange if solving for f or λ
UNITS
TIP
Hz means “per second”
WORKING
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ANSWER
READY
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SOLVE FOR
v
Pick the unknown
ROUNDING
2DP
Result rounding only
FREQUENCY (f)
Hz
hertz (Hz)
WAVELENGTH (λ)
m
metres (m)
REMEMBER
v=fλ
Rearrange if needed
UNITS
TIP
Hz means per second
WORKING
—
—
—
—
—
ANSWER
READY
—
PAGE 1/2
HOW TO USE
1) Choose SOLVE FOR
2) Enter the two known values
3) Press SOLVE
4) Check your units
FORMULA
v = f × λ
v in m/s
f in Hz
λ in m
REARRANGE
f = v ÷ λ
λ = v ÷ f
Divide to “move” a value
WORKED EXAMPLE
f = 5 Hz, λ = 2 m
v = 5×2 = 10 m/s
If v=10 and f=5
λ = 10÷5 = 2 m
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