"Pentcho Valev" wrote in message ...
Initially, the observer is at rest relative to the light source. Then
the light source emits light towards the observer and this light has
frequency f, wavelength L and speed c relative to both light source
and observer. Before the light reaches the observer, the observer
starts moving towards the light source with constant speed v.
Accordingly, the speed of light relative to the observer automatically
becomes c'=c+v and the frequency the observer will measure is:

f'=c'/L=(c+v)/L or 2+2=4

No, teach Einsteinians for 100 years. The wavelength remains constant
relative to the light source but varies with v relative to the
observer so that the speed of light remains constant relative to both
light source and observer. The frequency the observer will measure is:

f'=c/L' or 2+2=5

Approaching source:
Frequency f' = sqrt(1+v/c)/sqrt(1-v/c) f
Wavelength L' = sqrt(1-v/c)/sqrt(1+v/c) L
so
f' L' = f L = c

If you have experimental evidence to refute this, feel free
to give a reference.

For v c
f' = sqrt(1+v/c)/sqrt(1-v/c) f
~ ( 1 + v/c ) f
= ( c + v ) f / c
= ( c + v ) / L

Were you born an imbecile, or did you just miss 11th grade calculus?
Or don't they have calculus in Bulgaria?

Dirk Vdm