New experimental results showed that Wien’s law was invalid. On October 19, 1900, Planck presented a new radiation law. In its derivation he set aside his reservations about the Boltzmann method and ...

Planck was as steeped in traditional physics as his colleagues, but he had an open mind. The older way wasn't working. So he changed one basic assumption: energy, instead of being continuous ...

Dark matter, an unseen yet influential component of the cosmos, continues to challenge physicists nearly a century after its effects were first noticed. Its gravitational influence, vital for ...

and a force that repels gravity known as dark energy (70 percent). Scientists have not yet observed dark matter directly. It doesn't interact with baryonic matter and it's completely invisible to ...

Dark matter has puzzled physicists for nearly a century, remaining one of modern science's greatest mysteries. Although ...

That’s pretty much all you need for instruments to determine Planck’s constant to a decent ... LED from the somewhat grandly named “photon energy array” and provide a way to adjust and ...

The primary goal of the mission is to solve the problem of “dark energy”, that is, why the expansion of the universe is accelerating. Euclid follows ESA's previous cosmology mission, Planck. Between ...