Albert Einstein Institute: "In the above paragraphs, we have only considered moving sources. In fact, a closer look at cases where it is the receiver that is in motion will show that this kind of motion leads to a very similar kind of Doppler effect.Here is an animation of the receiver moving towards the source:
https://www.einstein-online.info/wp-content/uploads/SRT_Dopplereffekt_Pulse_4_%C2%A9_Daniela_Leitner_Markus_Poessel_Einstein-Online.gifbetween subsequent pulses are not affected, but still there is a frequency shift: As the receiver moves towards each pulse, the time until pulse and receiver meet up is shortened. In this particular animation, which has the receiver moving towards the
By observing the two indicator lights, you can see for yourself that, once more, there is a blue-shift - the pulse frequency measured at the receiver is somewhat higher than the frequency with which the pulses are sent out. This time, the distances
The speed of the light pulses as measured by the source is c = 3d/t, where d is the distance between the pulses and t is "the time it takes the source to emit three pulses".
The speed of the pulses as measured by the moving receiver is c' = 4d/t > c, in violation of Einstein's relativity.
See more here: https://twitter.com/pentcho_valev
Pentcho Valev
There is something very basic what you seemingly have not understood so
far. The Doppler effect is additional to relativistic effects. It is the dominant effect at low speeds of course in case that the source is approaching or leaving the target. Do not mismatch the effects. I
recommend to read a book about relativity and make the exercises. Then
read about Doppler effects and make the exercises. Then combine both
effects. Then talk and write about it.
Il 08/02/2021 23:41, AndreK ha scritto:
There is something very basic what you seemingly have not understood
so far. The Doppler effect is additional to relativistic effects. It
is the dominant effect at low speeds of course in case that the source
is approaching or leaving the target. Do not mismatch the effects. I
recommend to read a book about relativity and make the exercises. Then
read about Doppler effects and make the exercises. Then combine both
effects. Then talk and write about it.
Are you really trying to convince Pentcho that Relativity Theory is right? Mission impossible...
Luigi Caselli
On 30.01.2021 17:56, Pentcho Valev wrote:
By observing the two indicator lights, you can see for yourself that,
once more, there is a blue-shift - the pulse frequency measured at the
receiver is somewhat higher than the frequency with which the pulses
are sent out. This time, the distances between subsequent pulses are
not affected, but still there is a frequency shift
There is something very basic what you seemingly have not understood so
far. The Doppler effect is additional to relativistic effects. It is the dominant effect at low speeds of course in case that the source is approaching or leaving the target. Do not mismatch the effects. I
recommend to read a book about relativity and make the exercises. Then
read about Doppler effects and make the exercises. Then combine both
effects. Then talk and write about it.
It is an empirical fact that the Doppler shift of frequency
and wavelength always are the inverse of each other.
Sysop: | Keyop |
---|---|
Location: | Huddersfield, West Yorkshire, UK |
Users: | 293 |
Nodes: | 16 (2 / 14) |
Uptime: | 234:58:03 |
Calls: | 6,624 |
Files: | 12,172 |
Messages: | 5,319,707 |