Unsolved problems in physics
The following is a list of notable unsolved problems grouped into broad areas of physics.Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result. The others are experimental, meaning that there is a difficulty in creating an experiment to test a proposed theory or investigate a phenomenon in greater detail.
3 episodes
Episodes in this category also belong to the following categories:
Dark Energy
Melvyn Bragg discusses the recently discovered, and mysteriously named, 'dark energy' which may make up 70% of the universe.
17 March 2005
Featuring: Martin Rees, Carolin Crawford, Roger Penrose
Gravitational Waves
Melvyn Bragg and guests discuss Gravitational Waves, mysterious phenomena that ripple the fabric of space-time.
17 May 2007
Featuring: Jim Al-Khalili, Carolin Crawford, Sheila Rowan
Superconductivity
Melvyn Bragg and guests discuss ideas about why some materials lose their electrical resistance at low temperatures and expel their magnetic field and why that matters.
26 January 2023
Featuring: Nigel Hussey, Suchitra Sebastian, Stephen Blundell