Viewing a single comment thread. View all comments

ElleRisalo t1_jajbwmc wrote

Reply to comment by Ramen576 in Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science by AutoModerator

In real world application Photons lose energy all the time colliding and scattering off objects.

If a Photon can travel a straight line in a vacuum it will travel that line forever without loss of Energy.

However in space for example there is just so much stuff out there (including other photons) to collide into that photons are constantly be redirected rerouted or absorbed by other particles and objects.

This is what leads to depletion of energy, adjustment of wavelengths that is call red shift.

−1

mfb- t1_jal74rn wrote

Bullshit.

Redshift comes from the expansion of space, not from collisions.

If it came from collisions then we couldn't make out any individual redshifted objects because all the light would be scattered into random directions.

2