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Multiple Choice
In the SI system, what is the unit for wavelength?
A
meter ()
B
joule ()
C
hertz ()
D
second ()
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1
Recall that wavelength is a measure of distance between successive crests (or troughs) of a wave.
Since wavelength represents a length, its unit must be a unit of length in the SI system.
The SI base unit for length is the meter, denoted as \(m\).
Other units given, such as joule (\(J\)), hertz (\(Hz\)), and second (\(s\)), represent energy, frequency, and time respectively, which are not units of length.
Therefore, the correct SI unit for wavelength is the meter (\(m\)).