[Malamute Lover]

The speed of light can be determined with marshmallows and a microwave.

https://wonders.physics.wisc.edu/measure-the-speed-of-light/

This is technically neither a two-way measurement nor a one-way measurement but a zero-way since it is measuring the (half) wavelength of a standing wave. The speed of light (EM radiation, which includes microwaves) is calculated by wavelength times frequency of the microwave oven.

[hamdani yusuf]

If this (very similar) experiment didn't give the speed of light (in optical fibre) then people would have noticed.
https://www.picotech.com/library/experiment/speed-of-light

People could assume that the refractive index of the optical fibre deviates from what is stated by its manufacturer.

[hamdani yusuf]

The speed of light can be determined with marshmallows and a microwave.

https://wonders.physics.wisc.edu/measure-the-speed-of-light/

This is technically neither a two-way measurement nor a one-way measurement but a zero-way since it is measuring the (half) wavelength of a standing wave. The speed of light (EM radiation, which includes microwaves) is calculated by wavelength times frequency of the microwave oven.

We still have to measure the actual frequency instead of taking the value on the nameplate for granted.

[Bored chemist]

The speed of light can be determined with marshmallows and a microwave.

https://wonders.physics.wisc.edu/measure-the-speed-of-light/

This is technically neither a two-way measurement nor a one-way measurement but a zero-way since it is measuring the (half) wavelength of a standing wave. The speed of light (EM radiation, which includes microwaves) is calculated by wavelength times frequency of the microwave oven.

We still have to measure the actual frequency instead of taking the value on the nameplate for granted.

I can buy a frequency counter on eBay that will do that.

If this (very similar) experiment didn't give the speed of light (in optical fibre) then people would have noticed.
https://www.picotech.com/library/experiment/speed-of-light

People could assume that the refractive index of the optical fibre deviates from what is stated by its manufacturer.

I could measure the refractive index or, I could use a free air path and say the index is near enough to 1.

The speed of light can be determined with marshmallows and a microwave.

https://wonders.physics.wisc.edu/measure-the-speed-of-light/

This is technically neither a two-way measurement nor a one-way measurement but a zero-way since it is measuring the (half) wavelength of a standing wave. The speed of light (EM radiation, which includes microwaves) is calculated by wavelength times frequency of the microwave oven.

Since the standing waves are caused by reflection, it's a two way experiment

[xersanozgen (OP)]

The speed of light can be determined with marshmallows and a microwave.

https://wonders.physics.wisc.edu/measure-the-speed-of-light/

This is technically neither a two-way measurement nor a one-way measurement but a zero-way since it is measuring the (half) wavelength of a standing wave. The speed of light (EM radiation, which includes microwaves) is calculated by wavelength times frequency of the microwave oven.

Yes, we know this.

Humanity has successfully measured the speed of light. There is no  problem about this subject.

We are now looking for the increasing speed of the distance between a single/identified photon and its source; so, our problem is this.

[Bored chemist]

We are now looking for the increasing speed of the distance between a single/identified photon and its source; so, our problem is this.

Not quite.

If I send a brief flash of light consisting of many photons through empty space, they all arrive at the same time.
So there is no difference between timing a single photon (which is exceptionally difficult) and timing a group of photons.They all travel at the same speed anyway.

[xersanozgen (OP)]

We are now looking for the increasing speed of the distance between a single/identified photon and its source; so, our problem is this.

Not quite.

If I send a brief flash of light consisting of many photons through empty space, they all arrive at the same time.
So there is no difference between timing a single photon (which is exceptionally difficult) and timing a group of photons.They all travel at the same speed anyway.

Yes photon packet. However, if we use an analog cinema film the photon packet will draw a line on film strip. The first and last point of this line represent a single or identified photon.

For video film, we can use a  led marker for this.

[xersanozgen (OP)]

In order to label the measured speed  as a relative value, it is necessary to measure the speed in one direction as in mechanical.

When the speed of light is measured as bidirectional (roundtrip) and the measured value  is defined as the speed of moving away from the laboratory environment (i.e. fully relative), the analysis results in the special relativity theory.

The speed of moving away from the source of a photon can only be determined by one-way speed measurement.

However, unidirectional measurements do not give the c value.

Somebodies think they are doing SR defense by claiming that one-way measurement cannot give the speed of light. Because they hope the value c again.

However, one-way measurements give a  different speed value: c +/- Vu

This result clearly reveals the basic mistake of SR.

[Bored chemist]

Well, I'm still thinking of doing the experiment. Driving a laser with a 10 MHz square wave isn't trivial.

What do you think I will get if I do the experiment as I suggested.
I will have  with 2 sensors - one feeding each of the 2 channels on my 'scope.
 One sensor sampling the light before it's sent across the room and back (about 10 metres round trip) , and the other sampling it after it has made the trip.

Do you agree that what I should expect to get is a pair of signals, one of which is delayed WRT  the other by about 30nS?

[xersanozgen (OP)]

Well, I'm still thinking of doing the experiment. Driving a laser with a 10 MHz square wave isn't trivial.

What do you think I will get if I do the experiment as I suggested.
I will have  with 2 sensors - one feeding each of the 2 channels on my 'scope.
 One sensor sampling the light before it's sent across the room and back (about 10 metres round trip) , and the other sampling it after it has made the trip.

Do you agree that what I should expect to get is a pair of signals, one of which is delayed WRT  the other by about 30nS?

Vu = ~60 % c  (according to my first study: https://www.researchgate.net/publication/258810900_Light_kinematics_to_analyze_space-time )

Thereby  the results of one way measuring the speed of light will be found  interval 0.40  c  - 1.60 c

In my opinion the distance must be 20 meters in accordance with the precision of ossiloscope.

https://www.picotech.com/library/experiment/speed-of-light



https://www.youtube.com/watch?v=8kQdJ-XJt98

[Bored chemist]

In my opinion the distance must be 20 meters in accordance with the precision of ossiloscope.

I have a rather better 'scope.
100MHz b/w 1 Gs/sec

And, at least to start with, I plan to measure the 2 way path- bounced off a mirror.

[xersanozgen (OP)]

"A purely logical approach to Special Relativity" by mauro marchionni

https://www.researchgate.net/publication/332863521_A_purely_logical_approach_to_Special_Relativity


Measuring the absolute speed of the Earth by mauro marchionni

https://www.researchgate.net/publication/332798220_Measuring_the_speed_of_the_Earth

[xersanozgen (OP)]

The experiment was performed.

[hamdani yusuf]

The experiment was performed.

What experiment?