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The linear Stark effect for the first excited state of the hydrogen atomshows that, in the unperturbed states, the atom has a permanent electric dipolemoment (EDM) of magnitude 3eao (ao is Bohr radius). The EDM is not induce bythe external field but is inherent behavior of the atom. But the calculation ofquantum mechanics tells us that unperturbed states of hydrogen atom have noEDM! In the effect, two of four states have no energy shift. What are the EDMof the hydrogen atoms in the two states? Quantum mechanics can not answer theproblem. The statement that the EDM of the two states is perpendicular to thefield only comes from guesses in quantum mechanics. The two problems hadpuzzled physicists for more than 80 years. By introducing a new parameter thisarticle gives a satisfactory explanation for the effect. Our calculationdiscovered that, in the unperturbed states, the atoms not only have EDM with3eao but also can have only three directions of quantization! It is an entirelyunexpected discovery. This research is a vital clue that not all is well withquantum mechanics. We prophesy that hydrogen-like atoms, such as K, Rb and Csatom etc, may have large EDM of the order of magnitude eao in their groundstate (see arXiv:0809.4767, arXiv:0810.0770 and arXiv:0810.2026).

Two puzzling problems in explanation of the linear Stark effect of hydrogen atom and space quantization of the dipole moment