Physics TWDK Physics doodle by Giles Meakin

Physics seeks to answer the question "Why?" - to describe all the things we see, as well as their motion, behaviour and interactions. The science covers the entire history and future of the universe, and all objects from the fundamental matter we’re made from to the structure of galaxies.

Physicists look for patterns by making observations of the natural world, and models are developed to describe and predict them. Instruments, observations and experiments are then used to test and refine these models. Physicists sometimes aim to describe new things, and other times to improve the accuracy of an existing model. Based on the approach taken, each branch of physics can be divided into two aspects: theoretical and experimental. A key goal is often to combine several models into one - the ultimate goal of physicists in this respect is to complete "the theory of everything", though some believe this to be impossible.

While Theoretical physicists use mathematics to first describe the observed behaviour and then to explain it, experimental physicists perform experiments to test their hypotheses. Scientists believe that no hypothesis can ever be proven, so experiments are instead designed to disprove one - and "failing" to disprove it strengthens our confidence in it. Once a hypothesis is supported by several different tests and becomes accepted, it gets called a "theory" - but experimental physicists will continue to try to find problems with it, so that the theorists can further improve their models.

We've published 19 articles and 33 specialist blog posts about physics so far, featuring 178 unanswered physics questions! But we're not done yet as we still have another 269 physics research areas in our database to write about, so come back soon!

Recent Physics News

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Scientists in Japan Have Found a Detailed Record of the Earth’s Last Magnetic Reversal, 773,000 Years Ago
27th October, 2020
The Earth is overdue for a paleomagnetic reversal. The last one was about 750,000 years ago, but they usually switch every couple hundred thousand years.
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Recycling is important. It’s also overrated. Here’s what truly makes a dent in environmental pollution
26th October, 2020
Always remember the 3Rs: reduce, reuse, and recycle. But in this order!
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There’s a new record for the shortest time measurement: how long it takes light to cross a hydrogen molecule
26th October, 2020
To measure small differences in time, you need a really tiny clock, and researchers in Germany have discovered the smallest known clock: a single hydrogen molecule. Using the travel of light across the length of that molecule, those scientists have measured the smallest interval of time ever: 247 zeptoseconds. Don’t know what a “zepto” is? … Continue reading "There’s…
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The Color of Habitable Worlds
25th October, 2020
“This is where we live. On a Blue Dot.” said Carl Sagan when the now famous Pale Blue Dot photo was released. Captured February 14, 1990 by the Voyager 1 Space Probe, Pale Blue Dot remains the most distant photograph of the Earth ever taken at 6 billion kilometers. This past February marked the 30th … Continue reading "The Color of Habitable Worlds" The post The Color of Habitable World…

Our latest physics articles

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Image credit: Public Domain via Alexas_Fotos (Pixabay)
Time
What is time? We can measure it in terms of regular events like the Earth moving round the sun, but it can change with perspective, known in relativity as time dilation, and depends upon our perspective.
Image credit: ©
Entropy
Entropy or disorder, is a scientific measure of things spreading out, of uncertainty, or of the information required to describe something. Entropy always increases, so what impact does it have on our universe, our materials, and our concept of exist
Image credit: ©Andrew (Flickr, attribution)
Plastics
What happens to plastic when it gets disposed of into the environment, and how might it affect us?
Image credit: ©Photo by Crisco 1492 [CC BY-SA 3.0] via Wikimedia
Volcanoes
Volcanic eruptions can be hugely devastating events, wiping out towns and villages in the wake of the magma flows or ash clouds.
Image credit: © ©John Fowler (CC BY 2.0) via Flickr
Extraterrestrial life
The search for alien life catches many people's imagination and has always been a very public branch of science. So with all this investigation, why has our search revealed nothing? Are we truly alone in the Universe?
Image credit: ©Via Wikipedia Commons GONDRAN Alexandre Own work, CC BY-SA 4.0
Particles
On scales too small to see are weird and wonderful particles. Their bizarre properties make up the world around us, yet we hardly know a thing about them!

Show all physics articles

Our latest physics blog posts

Our blog posts focus on a specialist topic.
Many are written by scientists about their ongoing research, others by the TWDK team.

TWDK red science flask
Categorising Things is “Evil”
Thursday 21st of May 2020
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Magnetic Monopoles and Geometry
Tuesday 1st of October 2019
TWDK red science flask
Mysterious Mo
Thursday 15th of November 2018
TWDK red science flask
Is there a ninth planet in our Solar System?
Thursday 22nd of September 2016
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The Search for the Graviton
Monday 15th of August 2016
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The Case of the Jumping Carbons
Saturday 18th of June 2016
More blog posts about physics...

Delve deeper into Physics

Can't find what you're looking for? Browse the branches of physics that interest you most.

TWDK magnifying glassAstronomy is one of the oldest subjects of study. It seeks to understand everything outside of our world and explain how it got there.

TWDK magnifying glassAtomic Physics is all about the interactions between matter (the stuff everything is made from) and more matter, or between matter and light.

TWDK magnifying glassBiophysics uses the principles of physics to study life at every level, from atoms and molecules, to cells, organisms and environments.

TWDK magnifying glassChemical Physics is the study of chemical processes in terms of the atoms and particles that make up a system.

TWDK magnifying glassClassical Physics deals with the physics of everyday things - from ice cubes to bicycles, or cups of tea. Things we take for granted, but often don't really understand.

TWDK magnifying glassElectromagnetism is the study of one of the four fundamental forces in nature - the electromagnetic force, which mediates interactions between charged particles.

TWDK magnifying glassGeophysics refers to the study of the physics of the Earth and its environment in space, including its gravitational and magnetic fields, and its atmosphere.

TWDK magnifying glassMaterials Science deals with the structure and properties of materials.

TWDK magnifying glassMedical Physics ranges from enhancing diagnostic imagery to developing new techniques and equipment with which to treat patients.

TWDK magnifying glassParticle Physics is the study of the smallest things in the universe and the forces that govern their behaviour.

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