Physics
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?

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

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Physics
Air moves from the region where the air ________

Pressure is low to the region where the pressure is high
Pressure is high to the region where the pressure is low
Humidity is low to the region where the humidity is high
Humidity is high to the region where the humidity is low

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