Wavelength: ( lambda = frac{v}{f} )
Frequency: ( f = frac{v}{lambda} )
Wave speed: ( v = f lambda )
Use ( c = 3.0 times 10^8 ,text{m/s} ) for light in vacuum
Use ( v ) for wave speed in the given medium
Wavelength unit: meters (m)
Frequency unit: hertz (Hz)
Convert units before calculating
For electromagnetic waves in vacuum: ( lambda = frac{c}{f} )
For electromagnetic waves in vacuum: ( f = frac{c}{lambda} )