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Login | Naked Science Forum LoginOwing to excessive bot scraping activity, we are currently restricting access to the forum to registered members only If you are not currently a member, it is easy to join, however, via the register button above, although you must also write to Dr Chris Smith by email - his first name and then at nakedscientists com - to confirm your reasons for wishing to join Please login below or
How do atoms make colours? | Questions | Naked Scientists The biggest effect is actually what colour something absorbs Different colours of light have different energies The bluer the light, and light comes in blobs called photons, the more energy the photon has The electrons inside atoms can only have certain energies so they have what are called energy levels Maybe they can absorb a certain amount of energy or twice that amount
Why do doctors remove air from syringes? | Science Questions When you are given an injection why is the doctor or nurse very careful to make sure there is no air in the barrel of the syringe? Because when you cut yourself it doesn’t matter, there’s air all around the wound
What is the God Particle and Why Should I Care? Humans don’t float away into space, as in Frank in Kubric’s “2001: A Space Odyssey”, because the Earth’s gravity acts on our body mass Yes, mass is directly proportional to weight, the product of mass multiplied by the Earth’s gravitational acceleration Cheer up, on Mars you would weigh about 60 percent less! Standard Model Confirmation and Extensions The best description of the
Tetraquarks: new configurations of subatomic particles discovered Researchers using the Large Hadron Collider at CERN say they’ve recently discovered a new exotic form of subatomic particles called tetraquarks They exist for just fractions of a second, so they’re hard to spot and study But, luckily, University of Cambridge physicist Harry Cliff, is working on the experiment that discovered them, as he described to Chris Smith
QotW: Can transfusions change your blood type? Emma - Hmmm… interesting question We put it to our forum Polly didn’t think it was possible, Chris and Evan said you need a bone marrow transplant to change your blood type So we asked Dr Cedric Ghevaert from the University of Cambridge Cedric - Our blood cells are divided into red cells, white cells and platelets All our blood cells carry an identity card on their surface made out of
What is X Ray Crystallography? | Interviews - The Naked Scientists The key to the breakthrough of understanding genetic inheritance was understanding the structure of DNA, and, to solve this, Rosalind Franklin used a technique called X-Ray crystallography This enabled her to figure where the individual atoms are in DNA But how does it actually work? Materials scientist Megan McGregor explains
Why do colours look different under a sodium streetlight? Dave - That's to do with the way your brain is attempting to interpret the colour information Your brain attempts to take into account that different light sources actually look very different If you have ever seen a photo taken inside with a camera which is an attempt to compensate for this - inside with normal incandescent bulbs, it looks incredibly yellow and your brain