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Light disperses from a supernova explosion (yellow) to a site of detection (blue). As the universe expands, the light energy becomes diluted as it travels from its past, dense surroundings to its present, sparse surroundings. The light’s wavelength increases as a result of the decrease in surrounding energy density. Image credit: Annila. ©2011 Royal Astronomical Society
Read more at: phys.org...
The standard model of big bang cosmology (the Lambda-CMD model) is a mathematical model, but not a physical portrayal of the evolving universe,” Annila told PhysOrg.com. “Thus the Lambda-CMD model yields the luminosity distance at a given redshift as a function of the model parameters, such as the cosmological constant, but not as a function of the physical process where quanta released from a supernova explosion disperse into the expanding universe.
Read more at: phys.org...
If the universe’s expansion is due to mechanisms that “break matter to light,” then the universe’s expansion is expected to follow a sigmoid curve. Image credit: Qef, Wikimedia Commons
Read more at: phys.org...
Originally posted by swan001
I am really looking for data on electron/positron annihilation. To prove the equation right or wrong I need data on annihilation photons.
Originally posted by CLPrime
reply to post by swan001
Congratulations...you've derived the de Broglie wavelength, λ = h/mv. (That is actually quite a feat...considering it took thousands of years to figure it out the first time.)
What you have here is the wavelength of any particle or object with mass m and velocity v. Due to the conservation of momentum, it does also work for what you're dealing with (matter-energy conversion), but it's had much broader application since it was first formulated...back in 1924.
edit on 21-7-2012 by CLPrime because: (no reason given)
Originally posted by XPLodER
for someone who claims to be not really into math,
i think the op has done well
Originally posted by swan001
Right. Just as Einstein's E=mc2 is a tunnelled version of E=mv2.
Hey, I do read that you're Canadian! I am from Quebec.
What do you think about the other equation I found out?
m=((hc)/l)/c2
What do you make of it? I can't see any applications other than transferring light back to particles... But that can't happen, right? I mean, it would imply that light from the sun adds mass to Earth's surface. We know that to be untrue, it only adds energy by interacting with its atoms (photoelectric principle).