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Physics, Astronomy & Cosmology / What are the relativistic effects of super high temperature on mass?

« on: 14/10/2013 17:30:19 »

How will temperature effect mass in a relativistic way?
for example how would the relativistic mass of a system of particles - A, with n number of particles and temperature T where all particles have rest mass m differ to an identical system of particles - B, but with temperature T+x ?

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Physics, Astronomy & Cosmology / Can you diffract other EM waves the same way white light is?

« on: 12/10/2013 17:36:04 »

You can diffract white light into the visual spectrum of different colours, so can you diffract other parts of the EM spectrum in the same way?
e.g can you diffract 'white' radio waves into different 'colours'?
Where 'white' would mean un-polarised, non-coherent and a mixture of wavelengths .

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Physics, Astronomy & Cosmology / Does gravity alter the speed of light?

« on: 08/10/2013 23:15:37 »

Light is affected by gravity, its path is bent by gravity, demonstrated by gravitational lensing.

This got me thinking: speed of light is a constant, as we all know, however if its path and therefore direction is changing, is its velocity too? is light under acceleration when passing through a gravitational field?