Recent content by dom_quixote

Thanks, Dave! To see the entire universe as a single frame of reference, the observer would need to have superpowers, for example being everywhere at once.

Thank you all. Regarding the adoption of a specific frame of reference, what would happen to the proposed system if I adopted the entire universe as a frame of reference?

Thanks, Ibix! I think I found a particular situation in which it is possible to determine the simultaneity of two events, that is: beacons B and C flashing at the same time.

Thanks, Orodruin! You are right and I am wrong. I should have said that beacons B and C are only sensitive to the light pulse from beacon A.

I propose to you a kinematics problem described by classical physics. Three space beacons A, B and C are 300,000,000 m (approximately one light second) apart. Beacon A emits a bright flash every three seconds. Beacons B and C respond instantly to the flash of Beacon A by emitting...

I have no way of refining my question. I think I was clear enough in expressing my doubt. Thank you all presented high quality arguments.

I'm a Radio Listener and I've been studying this problem for decades.

How to capture the cosmic background radiation, if wherever the radio telescope antenna points, it finds a star? My initial idea is to check whether there is agreement in random signals captured by radio telescopes located at different points on Earth.

Two Radio-Telescopes point to the same empty point in space. Obviously no astronomical signals will be expected to be captured by the two instruments. However, at least the capture of cosmic background noise is expected. If the two Radio Telescopes have identical signal recorders operating in...

All molecules in the measurement system are vibrating at the white noise frequency.

It is known that in the double slit experiment, when successive photons are fired, the photons are statistically distributed on the target screen, as if it were a wave. What is the variable that changes between one shot of and another? Probably the slits change places as a function of time.

Fascinating! Thanks for the lesson and the links.

Thanks Baluncore! I found a better resolution photo on the net: I circled the areas of interest. The references are these: https://www.esa.int/Applications/Observing_the_Earth/FutureEO/GOCE/GOCE_giving_new_insights_into_Earth_s_gravity...

The gravitational mapping of the GROCE satellite projects to the left - at sea level - a rough outline formed by the Nordic countries, Finland and part of Russia. The same goes for Australia.