Hi experts ..(pls. refer the attached image)...the respective expert has defined the drawbacks of rutherford and defined bohr model orbits but that i I didn't asked , the ans given by the expert doesnt explain the ans to.my question ..the quest says : - " WHY electrons DO NOT radiaye energy when in discrete orbits of bohr model"? ...what is the difference in bohr model.orbits in comaprison to that of rutherford's model that electrons do not radiate energy in bohr's model orbits ? My question is WHYY ?

According to Law of electromagnetism ' Moving charge always loose energy in form of electromagnetic wave.'

The electrons are negatively charge particles so it will also radiate energy.

According to Bohr’s theory, electron will revolve in that shell in which its energy is quantized i.e. the energy of electron will be constant in that shell in which it  revolves around the nucleus. Therefore electrons do not radiate any energy.

So, the difference is simply that  In Bohr model discrete orbitals are considered while in Rutherford model electrons were considered revolving around the nucleus. This means, electrons would be in a state of acceleration all the time. Since electrons are charged particles, therefore, electron revolving in a circular orbit should continuously emit energy. So, it would no longer be able to resist the attractive force of the nucleus. Hence, it would move closer and closer to the nucleus and would finally fall into the nucleus by following a circular path. This means atom should collapse but actually we know atom is stable. This was why Bohr model came into existence.


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