3 views

Skip to first unread message

Aug 8, 2022, 1:31:56 PMAug 8

to

A light source emits equidistant pulses and an observer starts moving towards the source with speed v:

https://www.youtube.com/watch?v=bg7O4rtlwEE

The frequency at the moving observer shifts from f=c/d (frequency at the stationary observer) to f'=(c+v)/d, where d is the distance between subsequent pulses. Both relativists and antirelativists accept the formula f'=(c+v)/d. Sometimes the former speak of relativistic corrections (time dilation) but agree that, if v is small, the relativistic corrections can be ignored.

Given the formula f'=(c+v)/d, there are only two possibilities concerning the speed of light and the distance between subsequent pulses:

(1) Relative to the moving observer, the speed of light shifts from c to c'=c+v. That is, we have

f' = c'/d = (c+v)/d

The above formula is universally valid - whenever frequency and speed are considered, they vary proportionally. But the formula is clearly fatal for Einstein's special relativity.

(2) The motion of the observer somehow shifts the distance between the pulses from d to d'=dc/(c+v), so that the speed of light relative to the moving observer can gloriously remain unchanged. This is just as obviously idiotic as Big Brother's 2+2=5.

See more here: https://twitter.com/pentcho_valev

Pentcho Valev

https://www.youtube.com/watch?v=bg7O4rtlwEE

The frequency at the moving observer shifts from f=c/d (frequency at the stationary observer) to f'=(c+v)/d, where d is the distance between subsequent pulses. Both relativists and antirelativists accept the formula f'=(c+v)/d. Sometimes the former speak of relativistic corrections (time dilation) but agree that, if v is small, the relativistic corrections can be ignored.

Given the formula f'=(c+v)/d, there are only two possibilities concerning the speed of light and the distance between subsequent pulses:

(1) Relative to the moving observer, the speed of light shifts from c to c'=c+v. That is, we have

f' = c'/d = (c+v)/d

The above formula is universally valid - whenever frequency and speed are considered, they vary proportionally. But the formula is clearly fatal for Einstein's special relativity.

(2) The motion of the observer somehow shifts the distance between the pulses from d to d'=dc/(c+v), so that the speed of light relative to the moving observer can gloriously remain unchanged. This is just as obviously idiotic as Big Brother's 2+2=5.

See more here: https://twitter.com/pentcho_valev

Pentcho Valev

Aug 8, 2022, 1:47:12 PMAug 8

to

On 8/8/2022 10:31 AM, Pentcho Valev wrote:

> A light source emits equidistant pulses and an observer starts moving towards the source with speed v:

No.
> A light source emits equidistant pulses and an observer starts moving towards the source with speed v:

Aug 9, 2022, 5:20:34 PMAug 9

to

The motion of the observer cannot change the wavelength of the incoming light:

"Thus, the moving observer sees a wave possessing the same wavelength [...] but a different frequency [...] to that seen by the stationary observer." http://farside.ph.utexas.edu/teaching/315/Waveshtml/node41.html

"Vo is the velocity of an observer moving towards the source. This velocity is independent of the motion of the source. Hence, the velocity of waves relative to the observer is c + Vo. [...] The motion of an observer does not alter the wavelength. The increase in frequency is a result of the observer encountering more wavelengths in a given time." http://a-levelphysicstutor.com/wav-doppler.php

Accordingly, if the speed of the observer relative to the light source is Vo, the speed of the light relative to the observer is c+Vo: https://www.youtube.com/watch?v=MHepfIIsKcE

More here: https://twitter.com/pentcho_valev

Pentcho Valev

"Thus, the moving observer sees a wave possessing the same wavelength [...] but a different frequency [...] to that seen by the stationary observer." http://farside.ph.utexas.edu/teaching/315/Waveshtml/node41.html

"Vo is the velocity of an observer moving towards the source. This velocity is independent of the motion of the source. Hence, the velocity of waves relative to the observer is c + Vo. [...] The motion of an observer does not alter the wavelength. The increase in frequency is a result of the observer encountering more wavelengths in a given time." http://a-levelphysicstutor.com/wav-doppler.php

Accordingly, if the speed of the observer relative to the light source is Vo, the speed of the light relative to the observer is c+Vo: https://www.youtube.com/watch?v=MHepfIIsKcE

More here: https://twitter.com/pentcho_valev

Pentcho Valev

Reply all

Reply to author

Forward

0 new messages

Search

Clear search

Close search

Google apps

Main menu