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What physical quantity is the same for X...

What physical quantity is the same for X- rays of wavelength `10^10 m`, red light of wavelength `6800 A` and radio waves of wavelength `500 m` ?

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The electromagnetic wave tyravels in a vacuum along the z-direction. The electric field (E) and the magnetic field (H) are in the x-y plane . They are mutually perpendicular.
Frequency of the wave, v=30MHz=`30xx10^(6)s^(-1)`
Speed of light in vacuum, c=`3xx10^(3)m//s`
Speed of light ina vacuum, `c=3xx10^(3)m//s`
Wavelength of a wave is given as:
`gamma=(c)/(v)`
`=(3xx10^(8))/(30x10^(6))=10m`
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