**Ionization Potential of H atom**

The ionization potential of an atom is the amount of energy required to remove an electron from the atom's outermost shell. For hydrogen (H) atom, the ionization potential is 13.6 eV (electron volts). This means that in order to remove an electron from the hydrogen atom, 13.6 eV of energy must be supplied.

**Electromagnetic Radiation and Wavelength**

Electromagnetic radiation is a form of energy that travels in the form of waves. It includes a wide range of wavelengths, from radio waves to gamma rays. The wavelength of electromagnetic radiation determines its energy. The shorter the wavelength, the higher the energy.

In this case, the electromagnetic radiation has a wavelength of 1028 Å (angstroms). To determine the energy of this radiation, we can use the equation E = hc/λ, where E is the energy, h is Planck's constant, c is the speed of light, and λ is the wavelength.

**Induced Radiation from H Atom**

When the hydrogen atom is exposed to electromagnetic radiation of wavelength 1028 Å, it can absorb this energy and undergo a transition. This transition can result in the excitation of the electron to a higher energy level or even the ionization of the atom.

If the energy of the radiation is less than the ionization potential of the hydrogen atom (13.6 eV), the electron may be excited to a higher energy level. In this case, the hydrogen atom will not lose an electron, but it will give out induced radiation as the electron transitions back to its original energy level.

On the other hand, if the energy of the radiation is equal to or greater than the ionization potential of the hydrogen atom, the atom may be ionized. This means that the electron will be completely removed from the atom, and the hydrogen atom will become a positively charged ion.

**Conclusion**

In summary, when a hydrogen atom is exposed to electromagnetic radiation of wavelength 1028 Å, it can undergo a transition, resulting in the excitation of the electron or the ionization of the atom. If the energy of the radiation is less than the ionization potential, induced radiation is emitted as the electron transitions back to its original energy level. However, if the energy is equal to or greater than the ionization potential, the hydrogen atom will be ionized, resulting in the removal of the electron and the formation of a positively charged hydrogen ion.