Scientists are on the trail of a mysterious five-particle structure that could challenge one of the biggest theories in physics: string theory. This rare particle—never seen before and predicted not ...

Researchers at the Niels Bohr Institute, University of Copenhagen, have developed a tunable system that paves the way for ...

Just over 200 years after French engineer and physicist Sadi Carnot formulated the second law of thermodynamics, an international team of researchers has unveiled an analogous law for the quantum ...

PDF for physics from the official Punjab Board website. Access chapter-wise details for physics with the link to download the ...

Syllabus: The NTA has put the official JEE Main 2026 Syllabus online on their website: jeemain.nta.nic.in. If you're planning ...

Books Received Published: 15 March 1924 (1) Atoms and Electrons (2) The Atom and the Bohr Theory of its Structure: an Elementary Presentation Nature 113, 378–380 (1924) Cite this article ...

The basic hydrogen atom is the simplest of all atoms, now known to consist of a single proton and a single electron. Why even physicists still don’t understand quantum theory 100 years on ...

His particular bone of contention was the Bohr–Sommerfeld model of the atom, named after the two physicists, Niels Bohr and Arnold Sommerfeld, who developed it in the 1910s.

In his Nobel Lecture, Bohr also discussed the limitations of his model. Although it was successful in explaining the hydrogen atom, it could not be applied to more complex atoms with more than one ...