Respuesta :
the could tell by solar radiation and dark matter, they didnt know were dark matter was but they new it was there
Answer:
The effect of red shifting in wavelength is continuously increasing which depicts the expansion of universe.
Explanation:
In Doppler shift there occurs an apparent change in the wavelength of the light emitted by star
For example – If a star is near to earth, the light emitted by it would be shorter in wavelength while a star far away from earth will emit a light that has a longer wavelength.
Thus a shorter wavelength light is shifted towards the end of spectrum which is blue while a longer wavelength light shifts towards the red end of spectrum (known as redshift)
The farther the star from earth , the more it is red shifted . The red shift effect is continuously increasing.
Hence, both Doppler and redshift affect depicts that universe is continuously expanding.
