45 subscribers

Special Theory of Relativity
  |  Software Dev  |  Science Stuff  |  Travel  |  Golf Tips for Beginners  |  Entertainment  |  Mindfulness  |  Finance and Investing  |  Austin  |  India  |  Diet, Health  |  Miscellaneous  |  Sports (Non Golf)  |  

framework of STR, interesting problems

What does space-time look like from a photon’s point of view? | Posted on by Anuj Varma

 A frame of reference cannot ‘travel at light speed’. That frame would (if it DID make it to the c) see space collapse to a point in the direction of travel. So – there is nothing for it to ‘see’ … Continue reading

Does time stop for a photon? If so, how can it move (travel)? | Posted on by Anuj Varma

The photon’s time doesn’t ‘stop’ – as far as we can tell. Relativity doesn’t have frames of reference moving at c, so it’s not possible to define how fast time passes for a photon. Consider an observer traveling close to … Continue reading

Rare finds in Special and General Relativity | Posted on by Anuj Varma

Understanding the two theories of relativity is not just a pastime for physicists. There is something existential and comforting about imagining ‘riding on a light wave’ and how the Universe might look to such an observer. The glut of books … Continue reading

On the Ether | Posted on by Anuj Varma

One of the things I never fully grasped in college was the ‘Michelson Morley’ experiment. I understood what it was for (proving the constancy of the speed of light) – and understood that it proved that very well – but … Continue reading

Watching Television while moving Relativistically | Posted on by Anuj Varma

Imagine you are in a spaceship moving away from the earth at a velocity v. Imagine that a TV broadcast is sent to your spaceship from Earth. How would you see the broadcast? Some mathematical preliminaries will help figure out … Continue reading

Solar sails – How do they work? | Posted on by Anuj Varma

Light has no mass – yet it can push solar sails. How? It is true that photons do not have “rest” mass. They do have energy  – and hence an associated mass given by m = E/c2. Light has momentum … Continue reading