[] 相対性理論はインチキだろう.
155. 2022年11月21日 13:29:09 : zsnQh26eIo : aGtYeFhmL1FKQ2M=[1]
Remarks (wavenumber, invariant) 　(クリ)

It seems that for incident light from outer space, the wavelength is supposed to vary with the frequency variation due to the motion of an observer. It is λ that varies in the formula c = f λ.

There is a word "wavenumber". It is the number of waves in a unit length (1 cm or 1 m) and is called Kayser. Like 25,000 K (visible red). This wavenumber and wavelength are reciprocals of each other. Therefore, since the wavenumber is an invariant, the wavelength will also be an invariant. That is, the wavelength cannot be varied with the motion of an observer. It is the speed of light that varies.
http://www.asyura2.com/0306/idletalk2/msg/1242.html#c155