The laws of motion of electrons in an atom contradicted the laws of electrodynamics. Circular motion is accelerated motion, so an electron in an atom must emit electromagnetic waves with a frequency equal to the frequency of its revolution around the nucleus. This should lead to a decrease in the energy of the electron and its approach to the nucleus of the atom. But in reality, atoms are stable and do not emit light in an unexcited state.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.