Recent content by dom_quixote

No problem, mate. I liked my colleagues' answers, as they were instructive and funny :wink: !

Yes, I watched the video. Since I found it interesting, I posted it here on PF to expand my knowledge.

This Physics Problem is Unsolvable This is the question presented in Sabine Hossenfelder's video. What would be the consequences of this statement?

Diameter length is a straight line; the circumference perimeter length is a curved line.

A relationship of quantities can be represented by a rational number or not. However, only when the relationship is made with a single quantity, the number makes complete sense. For example: a) Length A / Length B; b) Volume A / Volume B; c) etc. Note that PI is obtained from a relationship...

We know that ##\pi## originates from the L/D relationship of a circumference, where "L" represents the perimeter of a circumference and "D" represents its diameter. The size of a circumference does not matter, as both the perimeter and the diameter of any circumferecence always maintain the same...

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...