Q. Bohr's theory opposes the idea of which theory most?
A) Rutherford theory
B) Sommerfeld theory
C) De-broglie theory
D) Pauli's principle
As it was a multiple choice question,I marked A and B....Is it right?
Let's look at what is asked in the question and then each answer in turn. The Bohr model of the atom held that an atom consists of a positively charged nucleus surrounded by electrons that orbit it in discrete atomic energy levels. The previously conceived Rutherford model of the atom held the same idea of the nucleus, but the electrons were contained in a very generalized negatively charged "electron cloud" the surrounded the nucleus. The Sommerfeld theory is actually an addendum to the Bohr model that quantizes the energy levels of the electron orbitals (its actually the first application of quantum mechanics to particle physics). De Broglie theory is about the dual wave/particle nature of matter. And the Pauli principle holds that no two identical electrons may occupy the same atomic orbital.
So C and D really are unrelated to the Bohr model of the atom. B is actually related to the Bohr model. So the best answer here is A.
Bohr's theory opposes the Rutherford theory the most, so the answer is A.
Rutherford's theory has some fundamental problems which were not explained well, i.e. energy and orbits, and which are explained by Bohr's Theory.
1. Rutherford's theory tried to explain loss/gain of energy.
Bohr's Theory talks about neither loss nor gain of energy.
2. Rutherford's Theory does not have a fixed orbit around the nucleus where in Bohr's theory the orbit was fixed.