A photon of X-ray has energy of 1 keV. A photon of visible radiation has energy of 3 eV. In this context, which one of the following statements is not correct?

• A. The wavelength of X-ray photon is less than the wavelength of visible radiation photon.
• B. The frequency of X-ray photon is higher than the frequency of visible radiation photon.
• C. The speeds of both the photons in vacuum are different
• D. Both the photons have different energies.

Answer: (C)