The velocity of the hydrogen atom after absorbing a photon depends on several factors such as the energy of the photon, the mass of the hydrogen atom, and the direction of the photon's motion.
The energy of the photon is directly proportional to the velocity of the hydrogen atom after absorption. This means that higher energy photons will result in faster velocities of the hydrogen atom.
Yes, the mass of the hydrogen atom does affect its velocity after absorbing a photon. Heavier atoms will have a lower velocity compared to lighter atoms, assuming the same energy of the absorbed photon.
The direction of the photon's motion after absorption is dependent on the direction of the initial motion of the photon and the direction of the hydrogen atom's motion prior to absorption. The conservation of momentum must be taken into account.
No, the velocity of the hydrogen atom after absorbing a photon is not constant. It will continue to change depending on any external forces acting on the atom and the number of collisions it experiences with other particles.